I can recommend canvas printers that do special rates for artists. I've not ordered prints at wholesale over there yet though.
Lovely as it would be to just order from FAE, they are not wholesale - it would be nice if they did offer artist rates, but since they don't it doesn't make sense to use them for re-selling.
If you google whole sale prints UK, you should be able to find a place. Look at the menu at the top or bottom of websites in the footer and most will have a link to reseller/artist account/trade - which you can then sign up for an account for trade discounts.