Help on identifying air-hose parts on Dream Palace (Sega)

[BrainTaste]

Hello,
I'm looking to identify and replace two air-hose fittings on this super old (and unreliable) claw machine.
The game is Dream Palace by Sega, it was manufactured from 1992-2002.
Here is a wiki link to the game:
http://segaretro.org/Dream_Palace

I have the manual, but after finding out the names of the parts, I googled the listed names to no avail.

In the manual the parts are:
SP-Con Joint 6-m5 IN & SP-Con Joint 4-m5 OUT.

Any help would be greatly appreciated.