I'm not sure I understand your request. You're looking for a payment processor that is willing to accept casino, forex, etc. related transactions? If so, then I don't think there is a better alternative than running your own node and coding your own thing. I don't think a traditional payment processor is ideal for what you're trying to do.
They already were a payment processing business and they are only looking for partners that would use their services which as the OP have said that they already have permits from it. The question now is that would even anyone here in the forum would take a chance to risk their businesses on accepting this business offer -- in which I don't think that even anyone in this forum are onto looking for payment gateways as there are already tons of reputative platforms that has the same business idea.