Where to find 1.5kg or 3kg carbon dioxide tanks?

[MikeFallopian]

I'm desperately looking to get hold of a 1.5kg or 3kg carbon dioxide tank for my kegerator project, but I can't seem to find any. I already have a 6kg tank and can find ones in that size, but not the smaller size I need for my kegerator.

Does anyone know where I can find a tank in either of these sizes? I live in Cardiff, if anyone knows somewhere local to me.

Alternatively, does anyone have experience in using the midget widget system with cornelius kegs?

Thanks!

[chickenbroot]

I ended up going with the online place - http://gascylindersuk.co.uk/shop/index. ... ct_id=1060 - the only size I could find nearby was massive, and in the end it wasn't any cheaper than going online for me anyway. If you're lucky to have a local pub gas supplier locally I would expect the online prices are steep (you're talking £70 including deposit and delivery) - but my large gas cylinder including deposit was £95 or so, and I had to drive to Slough for it... I'm much happier with the smaller size given my space constraints, so it was worth it for me.