Way back when i used a place called "Ready Strip" i think now it is owned by others and the price has gone stupid. But it may be worth a call they could have regained their sanity.
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I know you stated you would be doing this in a driveway, hope it's level. The link below gives you a pretty good idea of what is involved. Has some pretty useful photos. Good luck finding a frame, they are out there, just takes time to locate them.
Photo Gallery :: Toyota Landcruiser Frame Swap
They are in your neck of the woods, you could give them a call and see what it would run you. Never know, maybe the price will fit your budget. Maybe post up in a TLCA club in your area to see if you can get a lead on a good frame.