These are new battery boxes I've been building with Bennett Dahl. We've been doing R and D for a few weeks and we've worked out a method to build these out of 16 gauge aluminum sheet. The backs are attached with small, flush mount machine screws. They are built to the CS:R club specs, which are 8.25" tall and 3" wide. These are slightly oversized, usually by about 1/16" to 1/8" in height and width to accommodate the NPC motors.
They are $280 a pair, plus $20 shipping in the U.S. Shipping is $45 to Europe, Australia, New Zealand, Mexico, and Canada.
We can cut motor ports in the sides for an extra $20 per pair, but since everyone's motor setup is different, we are leaving them whole as the default. They will come standard with 5/8" holes drilled for the knurled hose fittings, but we can leave those off by request.
These are sanded down to 120 grit. A bit of sanding to 220, and then some self-etching, metal primer will get them ready for finish coats of white.
Paypal $300 for a pair of boxes (which includes shipping) to firstname.lastname@example.org
Add $20 for motor ports.