Q. have an outstanding judgement against me to a company that is no longer in business. Am I still responsible for this debt?
A. Of course. Just because the business failed does not mean you are relieved of your obligation.
Q. If so who would I pay?
A. You will need to find out who owns the judgment today. The odds are very high that it was sold during the liquidation of the business -- the place to start would be to contact the attorney who handled the case for the judgment creditor. Or you could handle this the same as that 6 year old bad check -- wait until someone tracks you down and then whine about all the interest and charges.