Well... now thats tricky! It was Rite media from All graphics supplies. Then Spicers bought AGS, and rebranded it.
https://allgraphicsuppliescaribbean.com/products/rite-media-paper-9-mil - I'm pretty sure its some cheap chinese stuff... but it works.
https://nekoosa.com/products/synaps-om Nekoosa Makes Synaps - It only lists latex, but it could be worth a try.
Call your supplier and ask them to track down a solvent printable Synthetic paper - Theyre getting pretty popular. We've done everything from hang tags, to screen printed don't leave your food out or the bears will eat you papers for our provinces camp sites. You cant tear it with your hands, its water proof, obviously it'll crinkle if you roll it into a ball or something, but its way, way more durable than paper... it's great stuff!