IMO I would replace them, even though you are on a tight budget, its one thing that could cost you more money in the long run, you may have one of the rollers stick, when it sticks it will flaten a lobe on the cam, then your stuck buying a cam and set of lifters. I think everyone has there own opinion on what to do, and there is a million ways to cheap out on a job, I just dont want to see you get burned in the end.