Does anybody make aluminum Tamiya rig axle cases?

[Espeefan]

Just like the title, I'm wondering if anyone has ever offered all aluminum Tamiya semi-truck drive axle cases that are a direct fit? I know there are Rc Channel's axles, and some TLT-1 axles cases out there, but I definitely would want one with the pass through shafts. I don't think I've ever seen any. Would it be possible to take two TLT-1 alloy axles and make a pass through shaft case, by using the pinion sides of both the cases, bolted back to back?

I know RC4WD has one alloy axle, but it's only the rear, single shafted design.