A Payment Gateway - without pop up windows

Hi, we are doing a donation charity project and need a payment gateway connected to this form: <[login to view URL]> (it's just a test/demo) We are looking for a payment gateway that can be intregreted into this without having ugly popups or stuff like that. **Can someone either sell us what gateway to use to do this, or even solve the job for us. ** The price per transaction should be below 0.50 USD, and the starting cost probably about 1000 USD, and the gateway should accept charity - some don't do that. Already tried [login to view URL] and cybersource, but they only deal with US companies. Hope someone can help, or know of gateways that are easier to deal with.