does anyone know who makes a suitable tank crew for this tank, and perhaps upgrades and infantry figures to go with it.-thank you/badger

I assume you mean 1/35...as not heard or seen a 1/25 from Tamiya.

These are some of the best 1/35 figures on the market.....https://www.migjimenez.com/en/468-figures

Tamiya did do a 1/25 scale Panther A (radio control), but is now discontinued:-
https://www.tamiya.com/english/products/56601panther/panther.htm

Cheers,
Andrew

New one on me Andrew...I stand corrected