Neil,
I'll be on the lookout for a possible chassis here in my area, but considering where you live, there are other possibilities. To do the steering swap correctly, the engine and tranny should be out of the car which I assume you would be placing up for sale. To ship the car to you in California is not cheap and if not driveable, a surcharge is usually added to the freight. You'd have to check out of curiosity with some shippers....many can be found in Hemmings. What the freight would be alone, you could probably get the job done there by a good street rod facility and they could probably make engine mounts etc for you. Most have bare blocks and tranny casings to work with for setups. If I had to do it all over again, this is probably the route I would have taken to save so much time...and they have more experience. To find a reputable shop, ask around in the street rod/gearhead groups
for recommendations. It's similar to finding a good independant
shop to work on your MB.

Let me know what you decide and if you can find a shop.

Good luck,
Tobias MB
4 MBs