I'm looking into this at the moment as well.
The rivet squeezer is available from the states on ebay, but is not cheap - about $180 including shipping.
If anyone knows of any second hand ones out there, I'd be very interested............
My 2As all have pop rivets holding the seals on at the moment, and they were done in service, but the semi tubular rivets look much better.
ffr79, where did you get your door seals from? There are some dodgy ones out there, and the genuine ones don't seem to be available at a reasonable price from what I can see.
Cheers,
Mike.