[dsraven]

How about some channel laid on its flat side against the frame or against a short boxing plate on the inside of the frame, then bent in a U shape to go under the trans and then again to come up the other side. For the bends you could simply cut off the flanges of the channel for that section then bend the remaining central flat part around something of the right diameter, then jig it so it stays in that shape (like lay it on its side and tack it to the workbench) and make some new flanges for the channel from flat sheet to fit around the bend and weld them on. You could do the same U shaped idea with tubing as welI I suppose , with flat flanges welded on for frame mounts, but most guys dont have a pipe bender.