Adjustable reg issue

[ManInBlack]

Hey all, I'm having a bit of an issue with a tank I just picked up. Still waiting to get a PM back from the guy here who I bought it from, but I'm not sure how well that will go. Anyway, it's a PMI Perfect adjustable reg. I can't for the life of me find a rebuild kit online. I'm probably looking in the wrong places, but if anybody can help me find it and explain how to do it I'd really appreciate. Even helping me figure out what kinf of o-rings I need to get would be helpful. As you can see from the pics every oring I can get to appears to have disintigrated...

http://i121.photobucket.com/albums/o234/CrashInBlack/PMI0009.jpg

There's two orings that go here on either side of the clear spacer thingie...

http://i121.photobucket.com/albums/o234/CrashInBlack/PMI0007.jpg

and some other veiws...

http://i121.photobucket.com/albums/o234/CrashInBlack/PMI0006.jpg
http://i121.photobucket.com/albums/o234/CrashInBlack/PMI0005.jpg
http://i121.photobucket.com/albums/o234/CrashInBlack/PMI0003.jpg

Can anyone help? Thanks.

[ManInBlack]

Would I be better off getting another adjustable reg and putting it on this tank? Any suggestions there?