Here are the basic bits needed to construct the replacement amplifier - there's a small aluminium box (in two parts) which is going to become the chassis, two valves and their holders, and a pair of very good quality output transformers. I'd had these transformers squirrelled away with a view to using them myself at some point, and I wept bitter tears at having to give them up for this project, but the transformers have to be good ones or else the amplifier won't sound as good as the one it's replacing, so needs must....