This is a UK site and it appears you are in the US, ergo it is unlikely anyone here will know of any US law that can enable you to gain a refund from monies your husband owes you
In any case, if you were married at the time of these loans, then surely the money would be classed as both of yours in legal terms?
I imagine you have small claims courts in the US? Try one of those. I would think there will be lots of information on how you can use small claims and how much you can claim in your state as I do know the amount of SC varies a lot form state to state