I have to keep Tino & Bunny in harnesses too bc I worry about their tracheas as well.
Here are some links:
The first one comes in green:
http://www.theloveofpete.com/index.p...pshop&Itemid=1
They each have this harness and I love it! It come in red and its sooo cute!
http://www.theloveofpete.com/index.p...pshop&Itemid=1