Get a set of folding rollers and just put your road bike on them. There is no substitute for the exact same fit and feel that you get with your road bike on rollers. I don't get bored on rollers because I don't ride them for over 2 hours at a time. That's enough. Performance has a set of suitable rollers on sale:
http://www.performancebike.com/bikes...21_-1___000000