I did the research and found the exact 3M tape that Isuzu calls for and bought some... however I'm thinking twice now about using it especially due to the added weight of LineX...
Either way I decided to replace ALL the grommets (for both screws and plastic push pins) and plastic pins that are in the cladding so that everything is strong. The grommets come in 2 sizes from Isuzu. There is a "smaller" grommet (which is not as deep) and a larger grommet (which is deep). The smaller grommets were used for the driver and passenger door which in return used the smaller size cladding screw. All other grommets meant for cladding screws were the deeper kind which in return accepts the longer cladding screw.
When I ordered from Merlin I asked him if I can get the longer screw. I changed the grommets on the doors from the smaller size to the larger size, so now all grommets that are meant for screws... are the larger size (i think by a couple mm longer) to have a bit more strength. The holes in the truck are all the same size (4mm hole), but Isuzu just put different size grommets to accept different size screws. I basically just changed it all to accept the longer screws.
To save money and have an easy source for the grommets, I sent a sample pack of hard to find nick-nacks to the actual company of Auveco (www.auveco.com) (here in KY). Pam from there sent me back identical versions that they carry. The grommets even have the rubber seal so that it doesn't rub the paint. I also got the fasteners for the front of the door sill, engine hood cover, interior panels, tirewell area (the plastic screw things), and other nick nack stuff.
I'll get all those numbers for you if you are going to replace any of that stuff. The plastic push pins (officially called a fastener) I could not find a replacement for so far and I haven't sent it to Auveco. I just ended up ordering from Merlin. But I know that one exists from Auevco, just takes time to measure everything in metric and then cross reference with a thick paper book (oddly, it has things their site doesnt have and she sent me 2 copies of the catalog).
I'll chime back in with part numbers for all that stuff including tape if you need it...