I have not seen one. I do own A Sun Optics saddle mount rail and it is well made and well machined. My only concern would be the unsuported cantilever made of aluminum and whether it will bend. Barrels with cantileavers integrated tend to be steel. Looks like it is going to be a lot of extra rail than you will need. may want to get some rail covers to cover the unused rail. If you are unfamiliar with rail covers go to www.midwayusa and search for picatinny rail cover. There are several styles available and they cover the excess sharp rough rail. I prefer the ladder style covers.