hexar rf relpacement viewfinder?

[Black Shepherd]

I recently lost the RF viefinder eyepiece that is prone to fall off. looking for a replacement. The usual suspect for replacements in the U.S. Greg Weber is out and I found a thread on photo.net that mentioned a way to make a new one. I dont trust my DIY skills there.

Anyone know where I can get a replacement? Or anyone have a spare one here that they want to sell?

Any pointers appreciated.