Got a replacement drive for a Shuttle, it is maybe 3mm wider than the original, however will fit with a bit of determination. It also needed a 20 to 24 way adapter cable, mainly to increase the length to fit. All done and fitted and machine is back up and running. Supply cost £15.99. That said still agree with Bremen, for customer, much better to replace with a new one, got the warranty, a processor bump over the NL40 from 1500 to 2200 GHz and only £85 more than a second hand power supply. Still pleased that I got it going again though. Thanks for the advice.