Identify this connector type? (DRC Filling)

[lugars4]

Can anyone help identify the type of quick connector used as the fill point on our DRC?

Bore is 5.5mm
OD 7.5mm

Couple of pics, im hoping to find a supplier of the hose connector so i can make my own test tool.

Hose connector i am after, as far as i can tell, it has a push button release.

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[RS4_Ollie]

Did you ever find out where to get these or what they are called, as I am interested in a couple?

Cheers

[RS4_Ollie]

I have found the company that make the vas6544 and they want €150 each connector so I will be changing the quick connectors for a universal hydraulic coupling as they are only screwed in. I have started to collect the parts to make a discharge and recharge unit.