Your post answers your own question. The DMV will only release addresses to the actual person, or when there is some law that requires them to do it. Attorneys can get that information in certain circumstances, but the one you describe is not usually one of them.
If you have their DL numbers, hire a private investigator to do a search for them. It does not cost that much, and depending on the value of your judgment, might be worth the expense.
Or hire a collections attorney. Most of them will collect a judgment on a contingency.
No, you cannot get someone's address from the DMV. After the death of actress Rebecca Schaeffer and the assault on Theresa Saldana, The Driver's Privacy Protection Act was enacted in 1994, which prevents the DMV from releasing private addresses.
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