Yep, they are a Lipsey's exclusive and you can find them on the Lipsey's website.
There's one for sale on GunBroker right now. I had a couple awhile back and sold them prior to ever shooting them. Real nice revolvers, wish I would have kept one.
If I remember correctly, one of mine was in a green case (Lipsey) but the other was in a grey case. Not sure where that one came from but I'm pretty sure it wasn't a Lipsey. Or maybe I'm not remembering correctly.......all I do know is that the ones in the green case as Lipsey exclusives.