I have a very high quality +/- 30V PSU for sale. It has an inbuit current overload protection (relay) set at 5 amps. This PSU was originally designed for use in high end audio equipment. It can also be easily configured to provide other voltages from +/-15 - 100v at up to 10 amps. Reconfiguration is simply a matter of swapping 2 resistors and a zenner. I originally planned to use it to power a cambridge drive card, you could also put it into a big power amp if you are planning such a project.
Link to manufacturer - http://www.wnaudio.com/active.html
These originally cost £125. This is unused and will be supplied with all documentation.
£60 includes UK postage and paypal fees.