I got mine from Amazon: https://www.amazon.com/dp/B01GSGNMFO/ref=cm_sw_r_cp_apa_fabc_nQibGbC27DH7K?_encoding=UTF8&psc=1 not sure if they ship intentionally but this is made in the US
Bro i gotchu https://www.amazon.com/dp/B01GSGNMFO/ref=cm_sw_r_cp_apa_i_X7raGbGBSKVVC?_encoding=UTF8&psc=1
It has acid free paper and Uv Protection
There’s this but idk about the quality
https://www.amazon.com/Poster-Palooza-Contemporary-Picture-Square/dp/B01GSGNMFO
Poster Palooza 18x18 Contemporary... https://www.amazon.com/dp/B01GSGNMFO?ref=ppx_pop_mob_ap_share
https://www.amazon.com/Poster-Palooza-Contemporary-Picture-Square/dp/B01GSGNMFO/ref=sr_1_5?dchild=1&keywords=18x18+frame&qid=1605224729&sr=8-5 I haven't been able to find a great frame yet because it's apparently a weird size but I did find this, hope this can be helpful to you!!
Google “18x18 picture frame” and click shopping. Tons of options.