I'm trying (and failing) to find a US source for telescopic hand crank masts as pictured below. They are super common on surveillance trailers, light towers, etc. but I want JUST the mast and nothing else for my use case. Does anyone have suggestions beyond what Google is finding for me? Also trying to avoid Alibaba... I'm only coming up with very expensive or very flimsy portable stuff, nothing that looks like what I want.
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