Ive organized a few state wide 3000gt/stealth meets and they always end up in late october or early november for the weather. I always hate trying to rally sponsors so i generally eat a few hundred in award costs... Plaques are like $20 to $25 a piece so you could give out a few awards on the cheap.
Got these at hit trophy .com
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'13 Asphalt FR-S // 6 spd, 3M bra, BeSpoke, Sportsguy83 arm rest, YoSpeed sills & plaque, P3Cars Vent Gauge +oil P sensor; on shelf: SRP pedals
'93 Pearl White 3000GT VR-4 // 5 spd, stock block & 30+ psi: 10.5@135