I have plenty of stuff around here I can reuse, I’m not fancy, I just saw it as a suggested item and was appalled at the price.Online for them tends to be expensive as they upcharge them to help cover shipping as they are a larger (long) item that costs more to ship.
Honestly ask a local greenhouse nursery to buy some.
Lowes and home depot sell them too and if you watch for next year, you can get them free from there when bonnie bell and burpee drop off their plant loads.