Use a flipper or proxmox to clone your card. If you don’t want to buy the gear, someone local on Facebook / craigslist probably offers card cloning. They’ll have a selection that usually includes stickers.
Finding proper tags can be hit and miss, these are what I used last time: https://a.aliexpress.com/_mP8G9eC
These aren’t stickers but I put them under a dbrand phone skin.
It’s a mm or two thick. You notice it if you look, but it’s way better than carrying keys.