clubsport/prosport fuel cell

[NASA racer]

My fuel cell has "expired" and other than having a custom cell made, I have to go through the US Radical parts network and pay a ridiculous amount for the replacement.

What's the availability of these in the UK? Has anyone sourced one directly from Advanced Fuel Systems (who doesn't respond to e-mail heh).

http://pictureposter.allbrand.nu/pictures/nasa+racer/radical/cell.jpg.html