I could get this done but it’s a heck of a financial risk.

It’d need an upfront order and payment to a supplier ( probably in China ) and probably 7 months to arrive once a design has been agreed.

Then there’s no guarantee they’d sell.

The club could ban the sale of merchandise around the ground as you need a permit to sell by the stadium.

The only way to do this is to be willing to burn £50k getting them made and then give them away.