Yeah MXM pioneered the idea BUT the owner has retired and handed the business over to his son.
His son is more in to modern and not really bothered about vintage stuff. He makes it when he can be bothered so just be cautious ordering vintage stuff from them nowadays. You will get it, they don't rip you off but it "could" take six days or six months. I personally don't use them any more.
There is another UK firm that have seized upon this opportunity and are printing top quality full coverage stickers.
They are very very good quality perforated thick stuff, they cost about £35.
Cant remember the name right now. I'll check it out and post up.