There are a few resellers on eBay that sell whole kits of used GLI interiors, both the brushed aluminum parts and the black fabric parts.
However, it can be pretty challenging finding the brushed aluminum trim pieces in good condition, especially the driver's door handle. It's almost impossible to find one that isn't dinged and dented. It's also pretty hard to find any of the other door handles with good soft touch, so going the brushed aluminum route isn't a good idea if you're trying to restore an interior to like-new. With that said, you can usually find most of the other pieces dent-free.
If budget isn't as big of an issue, you can still find some of the NetOptic trim pieces brand new, though you need to be careful because there are a few different shade of NetOptic and it can be easy to mix and match them. One example would be part numbers ending in VNF. They seem to be somewhat easy to find and are similar in color to the brushed aluminum. The NetOptic pieces maywear better over time since it's a covering on top of a metal surface underneath. If the thought just popped into your mind to buy NetOptic pieces and peel off the coating to get something approximating the brushed aluminum trim pieces, don't bother. The end result is a shiny and cheap looking metal.
There's also a "silver blue metallic" variant, which is a darker non-brushed metal trim. The part numbers end in RBA instead of NPX. I saw a near-mint set on eBay recently, but it was for manual AC controls instead of Climatronic so I didn't buy it. On the Vortex "rare parts" thread, there's someone with a "gunmetal" trim, but I wasn't sure if it was the same as the silver blue metallic.
In all cases, the passenger doors use the same pull handle part number front or back. So, parts from a 2-door will work in a 4-door. That isn't the case, though, for the driver's side since the driver's door handle came in two versions to support 2 or 4 window buttons.