I've bought a set off Amazon to use when traveling that has a bar. I started learning training exercises from Youtube and then bought another set of bands that I have setup in various configurations in my basemet/workout room. You can get in the game for <$30.

https://www.amazon.com/gp/product/B08LL62GPZ/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

https://www.amazon.com/dp/B0899BVHFL?psc=1&ref=ppx_yo2ov_dt_b_product_details