There’s TONS of them on amazon when you search up ferret hammocks and then there’s basic ones available at pet stores if you want something simple and fast! I have one I’ve had my eye on on amazon called Oncpcare Small Pet Hammock https://www.amazon.com/dp/B084RQSLMQ/ref=cm_sw_r_cp_api_fab_TWYHFbGGVJTA7 but I’ve never tried it, it has great reviews though! I’m planning on getting it when I get paid :D