We have done them for customers....very simple aluminum release lever mounted directly to the door striker (bearclaw) latch....no great mystery....just ask.
I will have to take a couple of pictures. Mine looks like a door lock except it is 1/2" SS tube with a 3/8" SS bolt with the head turned round.
Jeff Hamilton
You can totally make them up. In looking at how Fran's guys made them it was much simpler then I expected. I can try to take a shot of them if you need. You can alway come by if you are in my area as well.
They are attached to the pivot on the latch mechanism ...there is nothing to change ...just bolt on your lever with your preferred shape...(as each original is different)....and Bobs your Uncle...