Replace or Keep '64 Shasta Compact coupler?

I asked the exact same question a few years ago on this forum for my 1960 Mobile Scout.  I was doing a restoration and had concern for the ancient coupler.  The answer from more than one member was this: If is hasn't broken in 50+ years, it probably won't in the foreseeable future.  Furthermore, members here also attested that the steel used in those days was far superior in all of the relevant measures of steel "strength" than the contemporary stamped steel couplers you will find in all the usual places on line, with cheap steel made in China (but gosh bless the Chinese for their competence in mobile phone components/assembly and cheap HD TV's... just not high strength steel for cheap consumer products.)  

Regarding security.  I researched this thoroughly and found that not many coupler locking devices fit my 1960 coupler properly.  I looked and looked... and made it my business to see the problem from the thief's point of view.  I also found that the weak link in even the most robust devices, was the locking mechanism itself.  I found nothing that exceeded the defenses of the worst bicycle locks and dingys you use to 'lock' your luggage.  Garbage, all of it.  So I had to break the issue up into two parts: coupler access defense... and a world class lock.  Both separate problems in my opinion.  In order to defend my fully restored trailer (appraised at about $30K), I was willing to spend close to $1K to make its theft very unlikely.  Using all of the observations I've made from the coupler lock maker's claims, along with watching lock picking videos, along with the videos of a particular locksmith in Colorado... I designed my own custom coupler shield and paired it with a nicely modified commercial high security lock... making it ultra high security.  The shield protects the coupler, while also protecting the lock from typical physical attacks.  The lock's key cylinder, would take a professional many hours, if not days to figure out.  I had my design fabricated by a local retired blacksmith.  Along the way, we also designed a simple, but effective wheel lock, also with an independent high security pad lock.

If anyone would like to see pictures, I would be glad to post in the next few days.

UPDATE: I see Mobiltec chimed in about the crappy steel from China... He probably contributed to my thread from years back.  Definitely make sure your coupler is not damaged.  You can probably modify the latch part to accept a safety pin.

Mobil also had a thread recently on trailer security that had lots of good tips and approaches to reducing the risk of theft and also improve the chances of recovery.

Thanks for the responses. From what I can tell I don't have a hole anywhere close to what would lock down the coupler.
Picture:
drive.google.com/open?id=1nv8IHRaEZPp8Aqczv5dnER7eg6oocaUc

You have the little tips that slide into the open slots on top of the coupler. That is what locks the mechanism in place so it doesn't jump out by accident. They are on the side of the handle... See them? As for locking the coupler with a padlock is concerned, that wouldn't hold back a thief at all as they all carry bolt cutters. Using heavy chains and then locking them with a case hardened padlock is a much better way to go.

All post are very helpful. Thank you. I like the replacement coupler from Redline. I may look into that. Thanks

What Charlie said.....