I do not care for the ones with one wheel in the front. I buy mine on Ebay...have bought a few ... I use them a lot and also donate them to rescue for raffles.
Here is a link to the Ebayer I buy from:
Teal 09 Large 4 Wheel Pet Dog Cat Stroller w/Rain Cover - eBay (item 260479053578 end time Jan-11-11 09:53:05 PST)
I have purchased pink and leopard from them. They don't have them right now. The four wheeled ones with a rain cover are the best imo. If you email them, I am sure they have pink if that is what you are looking for. Often they have them for 50 which includes shipping.