There was a story in "Star Wars Tales" where Han Solo meets Quinlan, presumabely post Order 66. However I'm pretty sure that was written before the final Republic issues.
Quinlan most recently was in "Clone Wars", the episodes which had Ziro the Hutt.
Some of Ostrander's other Republic characters do appear in LEGACY but I don't think Vos or any descendants was one of them.
He also had another action figure recently from the Phantom Menace wave earlier this year. (Vos was retroactively in the film undercover in Mos Espa)