This must be the one - Link hidden: Login to view
It is based in London, has been in business since 1998 and can ship to 45 countries (does not ship to the USA). You need to apply as a reseller to get the bulk buy discount pricing. Link hidden: Login to view It accepts credit card for payment.
Please note that we cannot guarantee the safety of any suppliers outside SaleHoo.
There's one cd sleeves supplier in our directory. It is based in the USA and can send internationally - Link hidden: Login to view
I've learned that you are in UK, so the first suggestion will most likely be more useful.