Have you checked Extend (paywithextend.com)? They partner with banks - like Amex, City National Bank, Comdata, Silicon Valley Bank, and several others - to let

Have you checked Extend (paywithextend.com)? They partner with banks - like Amex, City National Bank, Comdata, Silicon Valley Bank, and several others - to let you create and distribute Virtual credit cards directly from your existing credit card.