Foundations , Furys and Patriots all used the same necks , the only differences being the decals.
The Patriot problem I have likely stems from a bad batch of maple.
I'd say a large percentage. Peavey were knocking out 500 units per day . By the time any issues started being reported : 1000s will have shipped. Guitar companies don't do product recalls , they just hope for the best
If you were unlucky and had a neck issue for Pete's sake don't split the neck in two

Truss rods can be replaced by "keyhole surgery"
I've sat on this for long enough , normally I PM folks.
Old Chip had a method to replace truss rods . I vaguely remembered it getting mentioned but not all the details so contacted a couple of folk who kept in touch with Chip. It's a simple method , involving a hammer , drill and some mole grips.
What follows has been copy/pasted from Chip's email.
Warning ! May cause distress to those of a nervous disposition.
"To replace a T-series truss rod, drill a 1/2" hole in the butt end of the neck; halfway between the mounting surface and the arched fret board surface.
The drill will tell you when you have drilled deep enough as you'll hear the bit contact the butt end steel anchor. Then use a brass or aluminum rod the same diameter as the truss rod to drive the rod out the butt end. When you get about an inch of rod sticking out the butt end, use a bench vise or Vicegrip pliers to pull the rod out the butt end.
Affix the butt anchor to the new rod and drive the new rod into the butt end after having smeared some epoxy around the anchor.
Put some more epoxy into the drilled surface to hold a bit of 1/2" Maple dowel in the hole. Saw or file the 1/2" dowel off flush with the butt end and spray some clear lacquer over the end.
The new truss rod should be threaded on the peghead end to 10-32 thread."