Cool man! Good luck with the build! Let me know if you need any other parts. Can't help with the axles, but I owe you for some other stuff, so don't hesitate to ask!
ThunderTech racing sells the whole truck for $175. You can then scrap the rest on E-Bay to get some money back. Those Bodies with all the chorme bring big bucks sometimes. Or you can buy the axles new from them for $150 or so. I bought 2 used sets with bearings for $125 each. If I find a pair I send ya the link.