Best Binders for Big Boobed Person?

I'm not transgender, but my best friend is, and he doesn't make as much money as I do to afford a binder, so I wanna surprise the dude with it on his birthday. He came out to me around 2 months ago and I feel like I haven't been outwardly supportive so I wanna show him I care real bad (I suck w/ words).

He's got a bigger droopier chest ( kind of like the size of a coconut ), pudgy (like skinny fat), and likes to swim and go to the gym and I know some of them you can't workout/swim with and i really dont wanna mess this up. Any help is appreciated. I can find out his exact sizing closer to when Im about to buy it I'm kind of just looking for brands right now for the homie