Honestly, I have searched DOZENS of sites and the celltei's are by far the best for concealing your pet... I agree, they are a little bigger and bulkier than what i was looking for too - looks more like a small duffle bag than a cute oversized purse. BUT, if you aren't trying to sneak your pup into places that don't allow pets, then there are lots of bags on this site
www.trixieandpeanut.com - I got one of the messenger bags from there and it sits nicer against my body and Oscar is nice and snuggly in it (he's fallen asleep in it) - Downside to this bag is that it's completely soft and doesn't have a re-inforced floor to support him - it doesn't seem to bother him though. There's also a lot of other bags on this site for a wide range of prices that don't scream "I've got a puppy in here!!".
Hope this helps!