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Ebay if you find some near enough to collect. Alternatively build some or repurpose some other furniture to do the job. You want the tweeters around head height sitting down anyway. Proper ghetto is some boxes with cloth over them. Cloth is optional. Artisan beer crates with vinyl in would do it.
I made some great ones out of scrap I had lying around but I'm a joiner so that's probably not as easy for anyone without a joinery workshop.
But where can you get speaker stands that are not either stupid expensive or horrible?
I've been looking for some for ages, every time I get depressed with the choices and give up...