Datsun Fairlady SPL213

I opened a small shed next to our family home and found this Datsun Fairlady SPL213. My great grandfather was the first owner of the car and it’s been parked there for years.

Here’s where I’m stuck. I’ve tried taking it to a few mechanics and no one wants to work on it. Every mechanic says they don’t know enough about it to work on the car and they don’t know if they can source parts.

I cant seem to find much information about the car online to restore it or recent sales since they apparently only manufactured a few hundred back in the 60s.

Photos attached. Appreciate any info or pointers.