That seams the best bet. There are plenty of tanks out there. I got a few parts myself recently at the right price its just a case of waiting.
I cant post photos for some reason I have another go later. DONE.
I got this! and a fair few bits for a RD250A. Forks, Yokes, Mudguards, Chassis, 2 Tanks, Loom (undamaged), Clock loom ( which is what I went for) Rear Light bracket (result these are getting hard to find) plus lots more. £85 and a drive to Yorkshire.