Just browsing about on t'web and came across Recirculating Immersion Controllers for use in sous vide cooking....
Basically, a 15l/min pump, 2KW immersion heater and PID/SSR all in one unit. I don't know what the price is, but they look as if they could be made into a self contained RIMS system with a bit of tweaking and attachment to a suitable vessel.
http://www.julabo-sous-vide.de/pdf/JULABO%20ED%20en.pdf
Also, various other models available...
http://www.julabo-sous-vide.de/en/products1.htm
Oooh.....look at this for RIMS....
Re: Oooh.....look at this for RIMS....
Bummer. Looks good though - for values of good =<£100!