Why not have them shipped to/picked up by a trustworthy individual in the UK, and then have them ship out to the buyers in the US?

It would add some overhead to the costs, but it seems like it would work the easiest.

1989 Dodge Power Ram 50 w/ no engine <- rotten frame <img src="/forums/images/graemlins/frown.gif" alt="" />
1988 Power Ram 50 2.6 Long Bed
1990 Mitsubishi MightyMax V6, swapping to the Daimler-Benz OM617 3.0L I5 diesel