Good luck on your search for parts.
If you have any questions along the way just ask.

The 700 although not a difficult box to rebuild can present some challenges. There are a couple special tools that are a "MUST HAVE" to be able to assemble the clutch pistons.
These are the seal installer tools. Without them its a no go and you simply can't assemble without damaging the seals.

I made mine here in the shop. You can do the same or possibly borrow a set.
The cost to purchase was not inviting for a single unit rebuild.

Good luck
Robyn