cajbrown, welcome to the site, you can only do a search using the *tags*. I've had a quick look through some of them and didn't come up with a star. Sorry I can't find you a star - but here's a flower for you, and for the rest of you ladies too.
Most sites have a "search" for a design that makes it a bit easier. I just went through that to find a suitable design my husband wanted on a t-shirt. The site raels mentioned would be a good place to start. You might also try Embroidery.com and EmbroideryLibrary.com. Also a lot of sites have been mentioned in past ?'s so you may want to check those.
I have not seen any stars on this site, just two suns. So I'm afraid you won't find them here.
check www.AnnTheGran.com you need to register but it is free and then you just type in want you are looking for
What type of a star are you looking for? Embroidery - cross stitch - 5 point - 6 point - and about how big? I may be able to help you find it.