Checkerboard Shirt
Alas, there is no checkerboard shirt in the same shade as AJ’s, so you can consider wearing a black/white version instead

Sweater Cardigan
Wear a cardigan over the shirt

Checkerboard Patch
The guy seems to really like checkers because there appears to be a checkerboard patch on his jeans. I didn’t see one exactly like it, I saw this rainbow heart one which you can cut into a square and attach to your jeans