At that price, all honestly, you might want to try an airsoftgun. Not to shoot, but rather just place the 10-22 into it. It is done all the time, a popular conversion is the Aug, Sig and Galil.
http://www.mfiap.com/airsoft/main_air.htm
Good site, always look on ebay for cheaper prices once you pick out a kit. Some kits are MFI exclusive by the way.
In Regards to the Galil SR
" On the other hand because it is using antiquated technology it is easier to modify into a more powerful airgun. Unlike the electric versions which are near impossible to fix or upgrade with out costing and arm and leg the Galil is a very simple on off type of valve system commonly found in spray paint guns. We have had several customers purchase these and modify them for shooting gallery use with velocities of over 1000 fps. Of course these modifications render the gun useless for gaming and make the plastic bbs explode on impact of a hard surface. The modifications entail replacement of the entire internal mechanism with a custom gas set up.
We have also had a few customers who have claimed that they bought this model and other electric guns and converted them to 22 caliber shooters. We can only assume these are done by using Ruger 1022 semi-auto rifles . "
Look damn real to me.
I'm thinking of a Ruger 10-22 conversion my self, STG-44?