Some more stuff I've been working on just for you. I made an aluminum oil bag with a 1/2" polycarbonate side just for kicks, and since I had some extra pieces at my work. It measures 6" dia x 9" long and holds 3.5qts. If you want it get a hold of me.
I also made some classy stainless weld-in fuel bungs. One is 1/4 npt and the other is for 3/8 id hose when using an inline petcock. $25 ea shipped.Different designs on the way or if you want something special you know the drill.