Hi again Morrisman,
Not much on Ebay in pulleys at present Do you have any scrap merchants, junk dealers and farm supply places around? Don't think I have ever bought a pulley in my life. Usually found something around.
Good luck with the Listeroid. Presume you have found the American site The Lister Engine Forum There is a wealth of knowledge on re-working and maintaining Listeroids there. Worth a read.
I am lucky enough to have an 8/1 Lister and a 7.5hp VA. (aircooled CS) with original alternator. Mains power here is pretty good, but it's a handy standby. Regards, Combustor.