You could try this:
http://forums.roversnorth.com/showth...7-FC-101-axles

Its been some time but he's got everything you want for the axle.

There are now Chinese XZL clones available on ebay. I don't think they are quite the same construction as the originals but then they are also not the price of the Michelins either.

If you search on ebay you'll find these: Yellowsea YS20 Military Tire 255 100R16 9-00R16

Or there are the original bar grips for sale. Search the usual;ly military vehicle mags and you'll find them.