Thought I'd put this on - I have no connection with them at all - but because we've been discussing recently the monopoly & inflated prices of both craft telly stations : https://www.perfectparchmentcraft.com/
I get emails from this company and they have some good prices (IMO) and free post over £5. Its not just Parching goods, there's a nice selection of supplies. If you click "shop" on the site it will bring up all the different departments.