Playmates had released a few crewmembers in the uniforms from The Motion Picture, but not all of them. 

I made custom figures of Kirk in his short sleeved uniform using a McCoy-body and legs and TOS Kirk arms (I even re-sculpted his hair, since he had a different hairstyle in the first movie than represented by the figure), a Lt. Ilia in uniform using an Uhura-body, Decker using a Spock-body and Barclay-head, Chekov using a Sulu-body and Scotty using another Sulu-body. I added some weight around the belly and re-sculpted hair and mustache on a TOS Scotty-head. I've seen customs using a Relics Scotty-head on a TMP Spock-body, but I don't really find those any good. I might go back and repaint him, though, as the uniform color is a tad too dark compared to the others.