customizing the pay pal module
Jamroom Developers
Might be easier to use the paypal module as a base to build your own module for this one. There are no directions because nobody has done it.
There are a few ways I could think to do it, use the events and listeners system
Docs: "Events and listeners"
https://www.jamroom.net/the-jamroom-network/documentation/development/1011/events-and-listeners
Hard to say exact steps without lots of poking around and building the module.

mailgun only gives us 'next page results' 'previous page results', so we cant jump to a page. sorry.