Leica M Summicron 50 V4 parts needed

Hi,

I have a V4 Summicron in need of an aperture cup. I bought the lens used and soon thereafter the aperture ring started misbehaving. Youxin Ye diagnosed the problem. It seems that Leica no longer produces this part so, I must either find a replacement or accept the fact I have one amazing paper weight.

Any help, leads, good wishes appreciated.

Thanks,

I dotta ask.
What's an aperture cup?

Maybe he means a 'lens cap' ??

What is a aperture cup? pictures? measurements? Im sure someone can make a quick design piece of it, if its not looking to strange. I could try if I have time, im not a cad expert. Been playing around with 123Design and such.