So I am looking for a replacement optical block for the Dukane ImagePro 8910, and all I am coming up with companies that will replace them for like $1k. Is there any way I can find this part somewhere (used or a non-functioning projector I could buy for parts), and replace this myself, ultimately saving lots of $$?? Or am I just out of luck and have to pony up the big $$ if I want to get rid of the huge yellow spot?