981 door panel removal tool - where from?

[DJMC]

In this useful video the tech is using some kind of gold card to remove all the trim pieces:

https://youtu.be/0m0dNsPhmbo?t=25

Any ideas if it's an actual tool, and where I can get one from? Just want to be properly prepared before I start pulling bits off.
Oh... and I have removed door panels before. Last one was back in the 70's iirc. I know to go slowly and be careful.

I have an annoying buzzing (like a bumble bee) from the driver's door trim when I go over rough surfaces or cat's eyes. Feels like it's coming from the speaker grill maybe.

Any other tips when removing? The guy in the video seems to have it all covered.

Thanks for any suggestions where to get the tool.

[Slippydiff]

I’ve not seen that tool before (if indeed it is a trim removal tool)
Here’s what I use :

https://www.ebay.co.uk/itm/265167867283

[DP1]

I bought this set to replace a broken vent in a Cayman

https://www.ebay.co.uk/itm/313582143807

It has some big yellow flat things which were very helpful to push the clips back