Whitman Hardcover Books:
View Master & Booklet
Aurora Model Kit
Johnny Lightning Toy "Woody" (not vintage)
Unfortunately, a soundtrack LP to the show, with all its groovy music, was never released.
Not exactly vintage, but long out of print, NuVentures released 5 VHS tapes back in the early 1990s. Each tape came with 2 episodes and were available individually or as a box-set known as The Mod Squad Stash Pack.
These same videos were later reissued in Canada with different case artwork and are of inferior quality at EP speed.