What would you recommend for a Stripe-backed SMB who has to turn away dozens of users per month because they only have some kind of "bank card" (which is normal

What would you recommend for a Stripe-backed SMB who has to turn away dozens of users per month because they only have some kind of "bank card" (which is normal in many European countries now). This business doesn't currently have the budget to implement support for all of these card types (Stripe UK does have support for most of them, it seems).