Nice start Lewis. Amazon have a special offer on the DVD for the Battle of Kursk, at around £7 IIRC, and I found quite a few good interior shots on various web pages.
I've worked with a operational T34/85, which I thought was basic, but the earlier version wree even more rudimentary! The very spartan interior was basically white overall, with the turret crew standing on the ammo boxes!
Sorry, I didn't take a note of the web-site pages, but there were quite a few, of varying degrees of 'usefulness'. I just Googled T34 and T34 at Kursk, as I was looking for the Model 1943.