Looking for a replacement antenna not currently sold aftermarket

Replaced my screen and was cleaning up the old adhesive and cut into an antenna on my a2014(cellular +WiFi) 12.9” iPad Pro 3rd gen. The antenna is the one next to the SIM card slot. In the iFixit teardown of the 3rd gen 12.9 the antenna was left in the housing. Looking to see if anyone has a rear shell that was used for parts with a complete antenna.