can you buy a new grid? getting my windows tinted and there pulling the old tint off but getting it off without breaking the grid.

 

Those grids are very common to most all cars. On my old FIAT I repaired breaks in the connection with a strand of wire and solder. Had to take it out and lay it upside down on the grass so I could get the solder to flow.

Otherwise replace the rear window.

 

They make kits you can buy at the auto parts store to fix the grid. It's a conductive paint just like the factory grid. You use painters tape to make it straight.

You could theoretically redo an entire grid with the stuff if you needed to.