I use a buddy belt. It's a bit more expensive than the puppia but it's all leather. I like them. They are easy to get on and off.
http://www.buddy-belts.com/s_45.asp#regularcolours
I also recently got this step in harness...I know shana has it on her site as well..it's really good and easy to work with.
http://tinkerbellscloset.com/items/h...ink-detail.htm