Odd Yale 805F and any advise on repairs - (photo heavy)

[candado3]

I posted photos and write-up on this lock on another forum. It was mentioned there that this is an oddball lock so I am sharing it here on this forum so that all that are interested can see it.

So, it started when I had what appeared to be a normal Yale 805F padlock with no key and decided to shim it open. When the shackle was opened and moved to the side there was a screw inside the shackle seat, which seemed odd to me. Hesitantly, (since I had never disassembled a padlock before) I decided to disassemble the lock and see what was going on. I was surprised when the brass cap came away from the lock revealing a cast ring that looks like it should be able to be removed from the body of the lock but it is very tight and I don’t want to mangle it. I then removed the screw and found that the spring had broken and there was the small broken part under the screw. All of the pins both key and driver appear to be serrated and two of the driver springs became misshapened when I removed them.

I am going to try to repair this lock and make a key for it and would appreciate any advise, esp in regards to what material to use to try to fabricate a new shackle spring and where I might get it this material.

Photos show what I found inside this lock.