Found these as well and they came within a few days: https://www.amazon.com/dp/B0136PR5TO/ref=cm_sw_r_tw_apa_i_w.AMEbPYX895E
I use this and love it https://www.amazon.com/Limm-Exercise-Resistance-Loop-Bands/dp/B0136PR5TO
I have some resistance bands I use - they're easy to stack if you need more resistance and they take up so little space compared to some of my other gym purchases.
I usually use mine for band squats, clams, donkey kicks - I'll pull them out when I'm watching TV or just lying around to get a little extra workout in.