Regarding 2.:

As mentioned above, FVD, Rose Passion, Mittelmotor.

Additionally: e.g.
- PartsWise they are from Netherlands (https://www.parts-wise.com/de/)
- Partworks (https://partworks.de/partworks/)
- and not to forget Porsche, in some cases the parts are even cheaper there - you can get the price on the website (https://www.porsche.com/germany/acce...artscatalogue/)
- a search for part numbers will show other shops, there are many more small shops around

 

I've not heard a bad word about Visser. In fact, the only specialist I've heard bad words about seems to have gone under for the final time. FWIW, I'm a Scots emigrant settled in NL, and especially after years of dealing with English who couch their speech in layers of idioms and never saying what they actually mean for fear of being 'impolite', the Dutch are wonderfully and occasionally brutally direct. It's fantastic. They're also excellent at saving, so bear that in mind. If you want every single nut and bolt replaced, then you need to say that. Because if it's not 'one time use' and still in spec, it'll get reused. I'm fine with that. You might not be.
Parts wise, Parts Wise (ha!), Mittelmotor, Alpo, Design911, RosePassion et al will all be within a few euros of each other on a big basket of parts. Porsche themselves can be 150% more expensive than the OEM for nothing more than a different box, although their not-available-from-anyone-else bits are often reasonable.

 

www.carnewal.com
They’re in Belgium

 

Most of the places have already been listed...
Good shout by @uli1266 on checking direct with Porsche, I scored a full set of rear lights for well under a grand.

Another shop to consider in the Netherlands is DRS Development drsdevelopment.eu
They have a youtube channel where you can see some of their work, plus checkout their Instagram.
Jan Mertens runs it and is really helpful, one of the good guys!
Sorted me out a couple of times with parts.

Here's my links for large companies supplying parts in:

EU
Europa Spares www.eurospares.com
Rose Passion www.rosepassion.com
FVD (usually more expensive) www.fvd.net
Carnewal www.carnewal.com/
Teile teile.com
Carpoint www.carpoint.de
Partworks partworks.de/
Parts-wise911 www.parts-wise.com

UK
Type911 type911shop.co.uk
Design911 (usually more expensive) www.design911.com
EB Motorsport eb-motorsport.com
Heritage Parts Centre www.heritagepartscentre.com

As a side note,
Don't know if you know @Rikard , he was stateside and moved to the Netherlands a few years ago.
So he'll know the Porsche situation both sides of the pond!
He had a mint green 964 which got stolen in Italy June 2021 (Still looking!).
Really nice guy, may be able to help you out...

 

Thanks guys

I will be there in Amsterdam next week to look over the car in person / meeting the Visser shop guys and overall get a sense for what to expect.

 

How long are you over for, and do you have transport? It's the Spa Six Hours from Thursday to Saturday, and it's only two and a bit hours from Amsterdam...

 

Thanks @964George
@audipwr1 Shoot me a message if you need help, I know and deal with some good shops which do a lot of stuff for US customers as well.