There's some cool stuff out there, but they all seem to have their OWN shops. You might try to become a partner or value added reseller to one of the custom shops, that way you could carry their line of cases n mods? Might be tough to do that from the start, but it seems like it might be easier more cost effective, compared to getting custom stuff made just for you.

What kinda paste?

We've had ours apart several times with just basic tools, but it was difficult to figure it out on our own. One current problem my nephew has with his console is that the drive won't eject. I was reading a fix that included adding a shim of celo-tape to the top of the disc motor; I was gonna fix it when they weren't looking :P

Do you know what happens to the drive to make it not want to eject? or if there's a more stable/permanent fix for this without replacing the drive...

Also, have you looked into re-lube products for re-lubing the read carriage and drive tray gears? I was thinking some silicone spray on the tray and vcr eject goo for the gears but I don't know what's appropriate for the read head, it's got some kind of grease for the plastic tabs and metal worm gear.