The easiest way is to add a two swivel studs to the forend. Screw a couple of these in:
Or add one of their barrel bands if they have the correct size. Here are some other sets, if you can't use a whole dozen, make some of your money back selling them to friends or mounting them on their guns. Refills:
Harris has some different attachments here, too:
The bipods are a little more than you want to spend, but I see them used all the time. I'd rather save for one than get a cheap plastic barrel clamp-on bipod that you will eventually hate.
And when you get a chance be sure to trick out that 10-22. Brownell's has about a million custom parts for them, great project gun: