There used to be a seller on Etsy that sold poplar arrow shafts. I don't remember the name of the shop. I remember they didn't always stay straight, but they were super easy to re-straighten. I don't think I ever used them for anything more substantial than hay bales, so the comments on durability were interesting. They were super cheap, as I remember. Maybe I'll try to find them again.
How are they for weight compared to, say, POC or Doug fir?