For those asking about the source of the holster, check here, looks like the one pictured above:
http://shopruger.com/Bearcat-Triple-K-Belt-Holster-RH-4-Barrel/productinfo/84188/I think the same one pictured in this thread I got from Shopruger.com, but it went down the line when I traded my Bearcats. It was quite nice for the price as I recall.
Date made for the Bearcat can be approximated at this Ruger link:
http://ruger.com/service/productHistory.html#