I had the same issue. I purchased the following from Amazon and love it.

Nelko Bluetooth Thermal Shipping... https://www.amazon.com/dp/B0C3XMFZD7?ref=ppx_pop_mob_ap_share

Just got a pack of labels, too. Super inexpensive and great quality.

QNCZ 4" x 6" Direct Thermal... https://www.amazon.com/dp/B0BZCQ6XY5?ref=ppx_pop_mob_ap_share