Long screws or nails to fasten PVC Trim through 1 1/2″ foam board

Hello all,
Long time reader – and old time contributor. This is my first time posting in a while.
I am used to doing “deep” energy retrofits, where we add 3 or 4 inches of foam board, furring strips, ventilated rainscreeen, etc.
The current project, my sons house, is a “mild” energy retrofit. We added 1 1/2″ of foam board on the exterior, with Tyvek stucco wrap. We are going to trim it with 5/4 PVC dadoed to receive vinyl siding.
I had assumed, apparently incorrectly, that I could get a kit with trim screws and plugs that had 3″ or so screws, but apparently those don’t exist. I’m not finding any long decking screws, like the TopLOC that will cut the hole for the plugs either.
In the past, with wood or Miratec, I have pre-drilled and filled with Bondo or other filler. And searching the forums I find posts where that is still an accepted practice. But I want to give one more shot at finding something premade and easy.
So do any of you know of a kit, or premade solution for this?
Thanks!
Replies
Long ss screws are common. Try McFeely's or Boltdepot. Get a plug cutter and make your own plugs. Or use trim head screws and caulk.
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Check out GRK for trimhead screws.
Longshot, one of those driver plug cutting kits might match up with a longer trim screw from GRK.
I’ll go out and see if the fastenmaster driver might work with a long GRK screw.
Edit : Fastenmaster is a square drive, so no to GRK. Seems you can’t get just the caps either. Longest screw looks like 2-3/4”