Mylar alternatives - sources in EU?

I'm going to try wet mounting with my Coolscan 9000 and will buy supplies from Kami.

I've seen discussions over at Large Format Forum that one can use Dura-Lar as an alternative to Aztek's mylar (which is about 100 Eur/100 sheets through Kami) without noticeable degradation in scan quality.

Does anyone know where in Europe one can find Dura-Lar or similar transparent/optically clear polyester sheets? And, which thickness is acceptable for use when wetmounting?

Thanks very much in advance
Philip

Thank you