This might be stating the obvious, but after all the effort you spent on your cabinet, why don't you just get new rollers? Rollers are pretty cheap, and I learned the hard way when I repainted the interrior of my house that a cleaned roller does not do as good a job as a new roller. I know the costs of building a cab can get pretty high, but a box of cheap rollers is less than the paint thinner would cost.
Just my two cents......