Wiring loom connector plug help

Hi all,

I need to extend a wiring loom (one that came with the parts I bought is for LHD, so too short) but rather than butcher the existing loom to extend it, I wanted to create a new one. The issue comes with the plug which is a 14 pole plug 6X0973817. I can’t figure out how to extract the existing terminals. None of my plug terminal extraction/release tools can get in deep enough to release the terminals. Does anyone have any advice or a source of a new plug? I’ve found some on eBay but they are Eastern European based with a long delivery time given the reduced aircraft movements at the moment.