Wal-Mart has Kleen Strip here, along with a few other brands in their
paint department.
If anyone has access to Worth brand products, commonly found in
automotive shops, they make a good spray can version of their paint
stripper. I've used both Kleen Strip and Worth with good luck on many
projects.
As far as online, there's Eastwood:
http://www.eastwoodco.com/
Joe McKishen
Vineland, NJ
USA