I'm absolutely amazed. I went shopping locally for pulleys. I wanted a 40mm but they only stocked 50mm un-bored un-key-wayed or tapped for grub screws. Long story short, I got it to fit but it wasn't pretty. About 4pm yesterday I ordered a 40mm pulley from College Sewing Machine Parts and the postman has just put it in my hand (11.45am). 40mm pulley, bored and keywayed, £10.08 inc shipping.
Well done College and thank you.
Forgot to say the first company wanted £35 for machining.