I actually have some axial wheels made for the Losi 420 sized tired IIRC, about 85mm wide, ~40-45mm offset, ~102mm diameter, usable with 17mm hex or 14mm with an adapter that's in the box, I only have 4 of them, was actually going to put them up on eBay next week if they'd work for you, they're NIB. The name on the box is (AX8012 - 8 Spoke Oversize MT Wheel (Black Chrome) Says it fits 40 series tires as well.
http://www.axialracing.com/details.php?Id=3285