Wow driving without a rear differential. I would definitely buy a diff and a rear prop from a scrap yard first or buy a recon from Bell Engineering. I know of two scrap yards for land rovers including freelander in Canada. I would think there would be more in the USA. It was different for me to to business over the phone. Most of these places do not have online catalog of their available parts. In retrospect it make sense, they have the vehicles, they just need to k ow what you want.
I bought a used tank cradle from a Miami Landrover scrapyard without any problems.