Do you want the seat to swivel? Do you want the stool on wheels?
Do you want to be able to raise and lower the stool, or would having it stay in a fixed position meet your needs?
Not sure what constitutes a shop stool vs. other stools so here are a few to choose from.
a SHOP stool is a stool you use while sitting at a work bench. It is a high stool so you can easily reach the typical work bench, not a foot stool.
Here are plans to DIY stools https://www.pinterest.com/pin/501095896036718591/
Thanks for the explanation Em. I guess we are just poor use everything from an old dining room chair to a crate to sit on. LOL