www.frost.co.uk do kits, possibly cheaper and lower cost than faffing about with bits.
The kits work out quite expensive comparatively and are only any good for rare useage at best.
All you need is a transformer, jar and the chemicals, nothing to it. Pretty much same equipment for anodising but thats hard to get right.
Luckilly i can buy direct by the gallon and get good advice on requirements.