magnets bought here: https://www.amazon.ca/dp/B09CNJ4GN8?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

PETG recommended, but currently using PLA and its holding up. 

NOTE: some force can be applied to the door jamb when the the door is attempted shut with door stop in. I haven't had any issues, but be warned.