12mm boom clamps in the UK

[plingboot]

Does anyone know where i can get some simple ali or delrin 12mm boom clamps (in the UK)?

I want to use them for making a simple pontoon to mount components on, between two gear rails.

 

[VINHEX]

Hi plingboot, I know this is not the UK but Andrew ships quickly will these help?
http://www.hexacrafter.com/index.php?id_product=53&controller=product

Apologies if not..

 

[Breezemont]

I can print you some, but postage would probably be a killer.
There's bound to be someone on that side of the pond who can as well.