[Andrew Rowe]

Back a few years ago you could buy the double roller bearing, complete with shaft, that was longer than the standard V8 water pump bearing from the local bearing shop. To make it work for the standard set-up you just trimmed it down. So maybe you get a couple of these and put your spacer in and put pulley on. It was something like what you mentioned , that had to be trimmed off if I remember rightly, Cheers Andrew.