But there is some hope. ABC makes their universals (optional) for their mini size cars in .5mm increments so you can get longer driveshafts (I think it's only the dogbone that is different). They are all in aluminium so if you want steel I can't help (the standard ABC universals are steel but come in one length only, and I think that is 39mm).

The ABC dogbone fits the Tamiya wheel axle.

Beyond the sizes available from ABC, there is a 42mm dogbone, but I forgot who makes it. Might be an old Tamiya chassis (TA04 maybe?)