Some options

Well, there is the Jaguar website: www.jaguarmodels.com
The last time I ordered from them I had no problems, it took a few weeks for the ordered to be processed and the kits to be shipped though. I have gotten quite a few Jaguar kits from e-bay sellers as well. Greatmodels sells them, but I believe they only have a few in stock at the moment, they would have to order from the company if they don't have what you're looking for in stock.