Here is the new part which is available and I am considering getting, I think Lane has one.
It seems so simple that anyone can make it. Can We?
Essentially, you see the top two holes on any latch and they made a metal rising bar that lifts up on the PIN. with the spring attached. Simple and Neet concept. Mike's as well is simple to do but this seems like it belongs Sorry Mike.
@aircooled this one you can make and sell