You can do it yourself
www.emachineshop.com USE the TWO user tutorials. They are GOOD and will teach you in no time flat. IF you really dont want to mess with it try asking Justin at www.cncgunsmith.com...
If you look at that grip its pretty much a simple shape/form. A block of aluminum, some files, a belt sander/sanding disk and some time would get the same result. Would also need a drill to make the hole... Practice with a bar of soap first, I kid you not it will help you visualize. You can also use BALSA wood from a model shop.... Good luck!!!
P.S. I think you should cop the PG on the YUGOs!! Its NICE