Or if you're lucky you can find a pack of fiberglass plant stakes on a clearance table. I found a big bundle of about 30 for $5. They were all taped up so I think they came from opened packs or something. But I grabbed them when I saw them They're only 31 inches but I grow plants in small pots that can get 3 feet or so and sometimes start to fall over and these are just right. Plus they were 1/5th the price of what they normally sell for.
I wish they were 4 feet but these will work for some things and they'll last longer than I'll be alive.