Hawk Tech Arms has had them in stock now and again (they're currently OOS). I'd look there, because they're cheaper, and they ship fast when you place your order.
http://www.hawktecharms.com/Ruger-Fa...-p/rug-bx1.htm
http://www.hawktecharms.com/Ruger-Fa...p/rug-bx1c.htm
I bought three (3) black and eight (8) clear in mid April from them.