Mee too..but radio silent so far from Ruger..maybe today(Monday)...Contact Ruger. They will want to fit it themselves and I agree with that policy.
This is a factory fit item. Please call our customer service department 336-949-5200 to set up an RMA and we can fit and time a new cylinder for you for approximately $180.00.
I've heard of some folks being able to buy one on the internet with success then I've seen this go the other way and it hasn't worked out. Even if it does work out most of the time, do you want to take that chance. If you are serious about getting the needed cylinder, then bite the bullet and go to the factory. It's common for me to see orphaned cylinders on the parts guy's table and yes, they sell them. Now then, somewhere in never land, there is a cylinder with the partial serial number of your Ruger….Contact Ruger. They will want to fit it themselves and I agree with that policy.
Maybe.Check ebay it will drop right in and work.