Probably under 1k. Get a strong emergency pilot container and a ram air reserve, I've seen nice Performance Designs reserves for 5-600 asking price, probably can get a strong container for about the same.
Thing is with a ram air, its a wing, you can turn on a dime, brake, dive and flare, I wouldn't bother with a round IMO when you can put together a ram air for about the same price. The DZ where I worked had ram airs in the pilot emergency rigs.
Call up your local dropzone and ask to talk to their rigger, he might have something laying around or know someone, he also will be able to put something together for you, and be a good contact for your 60buck repacks
DZ locator
http://www.dropzone.com/dropzone/
Here's one of the better sites for all that is parachute related.
http://www.dropzone.com/classifieds/
You would do well to take a few lessons at a DZ too, if youre going to bother strapping a rig onto yourself.
