Harbor Freight has them, but not sure they are open. If so, use one of their 20% off coupons to save a couple dollars. I’d avoid a tiny one if the rocket cannot stand on it. Mine has a round weighing platform about 6” in diameter.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp