Fairlight-CMI

Hello Planet Fairlight!

I'm the new and very excited owner of a IIx system that's missing a  
lightpen. I've looked through the archives and checked around the  
Interwebnet and have not been able to find a source for either a full  
on lightpen replacement or schematics to have one built. Is there  
anyone on this list who can provide some direction or assistance?  
Much appreciation in advance.

Cheers,
Scott