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Yeah it's really annoying, takes a lot of trawling. Maybe, as you have fairly specific requirements, you might be better off building something up? This would be a good start https://www.lfgss.com/conversations/313397/#comment13964748
Depends how urgent it is I guess. Problem with the cheap Chinese brands is they seem to be assembled without any lubrication, so if anything fucks up a year down the line you end up having to saw it off
Would definitely avoid Goku and the like (no-logo, teman), you will get a lot more for your money second-hand. Check the classifieds on here and Gumtree/eBay - although you may have to sift through pages of Goku ads on Gumtree...