Where to find this mount?

[league 4]

I need just the mount to this:

http://shop.ehobbyasia.com/dytac-doctor ... mount.html

Not that mount specifically, but pretty much any for that optic and can't find any RIS mounted ones. Only ones for mounting on pistols and acogs. Anyone know where to get one? Real steel ones are a bit out of my price range, $20 is the most I'd consider