well if you come to the tct show in september - I'm pretty usre we can sweet talk the nice polymaker people into giving you a sample roll :-)

I'll be on the scrounge again ;-)
http://www.tctshow.com/

I think we're going on the 29th this year. But I can always pop down on the 28th if that's the only day you can make. Nec is about 20 minutes from me.

Don;t know where you're looking but I make it £25 for 500gms inc p&p
http://shop.3dfilaprint.com/polysupp...ker-1610-p.asp

Okay not cheap - but cheaper than some of the stuff I've got. Also a lot cheaper than pva-m