USB Dual Male Connector
There is actually quite an interesting design question hiding in here. You won't find a single connector part that will do what you want as it isn't a standard use case that would warrant mass production (i.e. nobody would make it because they wouldn't sell many).

The simplest way would be to build a PCB containing two USB A male connectors mounted in such a way that they will be in the right place. I can think of three ways this might be possible.


The first thought would be to get some SMD male connectors and mount one on each side of a PCB so that you get two connectors out the same side. However this would require to find just the right connectors - you would need two different connectors, which are basically the mirror image of each other (as one would be mounted on the reverse of the PCB. It would also require the PCB to be close enough to the right thickness to space the connectors.
An easier option would be to design a small PCB with one SMD USB connector on it, and have the second USB connector on your main PCB. The smaller board would plug in as a daughter board using some other connector such that the two USB male connectors are mounted above each other.
A third option would be to make a PCB which has two SMD USB connectors like these ones mounted vertically as if they were through-hole parts. This should be possible as they have pins that stick out the middle, and metal edge tabs that could be soldered to pads on the PCB for support. You would need to design the board with the connectors at the right spacing to mate with the Pi, and then route the connections down through the PCB to a different connector which would allow the board to be connected to your main PCB vertically.