I recommend:
http://www.theisholsters.com/products.php Good product for a fair price.
I have found that my SR9c, 40 & 40c will all fit the same holster. The 40's being a touch tighter in the holster. Also it feels that the same holster for my SIG 239 can also be used with my Ruger's. (Not 100% recommended, only 98%
)
High Noon makes some good stuff also.
This is only what I have owned or tried.
Lateck,