The T-7000 is a Pioneer 9** series CD/LD/DVD player inside...apparently with very vew critical mods. I'm not absolutely certain which Pioneer DVD model is used for the T-7000 innards, but I've seen it discussed on a Laser Disc forum on the internet.
I'd speak to an authorized Pioneer repair facility, and you'd probably find the model number of the Pioneer LD that EAD used, as well as all the parts you need, and best of all, someone who knows how to fix them.
Yes I know it's a 5 year old thread, but hopefully this can help the next guy.