Rubber Stamps

Rubber stamping, also called stamping is a technique very often used in Mail-Art. Share your works, techniques and thoughts here. Also sometimes news from the largest Rubberstamp Archive that started in 1983.

photopolymer sheets - NL

In the techniques-thread I read about the photopolymer sheets.
I wonder if anybody knows where to get these in the Netherlands and how to order them.
Can I just mail them / take a CD-ROM with either photographs (jpg's/tiff's or EPS's)?
Can they be ordered by mail? Or is it wise to go there personally.
And if you get them what do they look like? Do they have relief, are they thick/thin?

Thanks fot the info,
Jan-Willem