I recently bought a 1986 300 ZX Turbo. It needs some work to make it a daily driver. I want to know if anyone has had any experience with rebuilding the electric adjustable suspension or have any leads on replacement parts such as struts, springs and shocks?

Welcome to Nico!

Unfortunately I don't think the OE adjustable inserts have been available for a number of years. You're best bet is finding good used parts, which is still not going to be easy, when I last checked the OE springs were still available, at least some fo them were as the year and model changed the spring rates a few times, and I last checked 10 or 15 years ago. Might want to give courtesy nissan (courtesyparts.com) a call, you might luck out.

As for rebuilding them, find a shock rebuilder and ask. The electronic adjusters are external, not sure if they are still available so might be looking used there as well.