Have you checked the Ceriatone forum? There are usually a couple of sale. I suggest getting a C-lator (tube driven effects loop) + your amp modded for the best results... with the C-later the amp sounds MUCH better, much more balanced, smoother, less harsh etc!
Thanks Emiel, I have one already and originally used the Kleinulator but didnt like it. The effects loop is the one sticking point with these amps, just tried a Lehle Parallel but that coloured the sound also. I only want to run a delay in the FX loop and have found that the old Boss RDD-20 Micro Series Delay works great through it, pedals are a no no !
Ive checked the Ceriatone Forum, nothing for sale at the moment but will keep looking. Thanks for the advice.