Hi, I've decided I am going to try processing my 4x5 B+W negatives with a Unicol or motor base and 8x10 filmd drum. I've already won the motor base from ebay and now am in search of a 8x10 film drum, the ones with the "ridges", but have not been able to locate one. Anyone know a place besides ebay where I might be able to purchase one? I would greatly appreciate any help. Thank You