I was able to find the pick guard and modify a P90 cover that was too tall by sanding down the back until it was the same height as the Seymour Duncan cover, but the humbucker trim ring I bought didn't have a wide enough opening. The black plastic trim ring that came on the guitar, the opening measured at 72.5mm, all the ones I can find online are 70mm, a few 70.5mm.
Stock Part Dimensions Pickup cover Height: 1.375 inches / 35 mm Width: 3.375 inches / 86 mm Depth: 0.5 inch Humbucker ring outer dimensions Height: 1.78 in / 45 mm Width: 3.58 in / 91 mm Thickness 0.17 in / 4.3 mm Inner Dimensions Height: 1.63in/ 41 mm Width: 2.92in/ 74 mm