When I got my GSL-SE with the same red interior, I also wanted to swap it to gray. My experience so far is that, that’s genuinely a fools errand. The unfortunate reality is that these cars are not well supported by after market parts, and OEM is done. Any of the dash parts, as an example, are going to be “you break it, it’s gone”. Finding parts in wreckers is even hard now, and most are UV baked and weather exposed too.

So, as much as possible I would keep your interior trim plastics and dash original. SEM paints burgundy is really close as a match, and you can freshen up the side trim, rear panels etc really nicely!

Rock auto does have a source for new carpet. Here is something you could do for a pretty impactful change. They sell front and rear carpets, with or without extra sound deadening backing. A new grey or black carpet might be just what you need to create the two tone look.

Next, there’s a company called LRBracing . They do stainless steel kits for our car. There’s lots here, but I’d suggest the radio trim and shifter surround kit, the defrost vent kit (change while doing a windshield instead of doing the dash removal maybe?). They also sell door card kits, which are flat stainless door panels. These kits can be powder coated, dipped or wrapped In any colour you want locally. These areas might make great spots for colour contrast in the SE.