Slingerland didn't call any of their kits a "Jazzette". Their 1960s catalogs list a 20-12-14 kit with 14" snare as the Modern Jazz Outfit.
Back to the original question... If you're not necessarily looking for vintage hardware, Guitar Center's clearance site has some decent deals on the stands that come with Yamaha HipGig kits:
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Yamaha HS650 Hi-Hat Stand $22.97 1 in stock: Charlotte NC
Yamaha CS651 Cymbal Stand $18.97 1 in stock: Tulsa OK, Bridgeton MO, Marietta GA, Totowa NJ
Yamaha FP6210 Bass Drum Pedal $20.97 1 in stock: Marietta, GA
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You'd have to call a store that has an item in stock to place the order, but it's been a pretty easy process when I've done it in the past and shipping's been very reasonable.