Howdy,
Yes,, there are 2 sources. One,, is Ruger's factory website. However,, we have found many errors in that list.
THe best is the Red Eagle News Exchange Referrence Guide. It's available to RENE subscribers, free when you join the first time & it costs $25 after that. It's updated about every 3-4 years or so.
You can get the best info with a phone call to ruger directly and ask for records & they will give you the month & year of the shipping date. (Whomever did the lists for the website did NOT use the factory records correctly.)