Epco
I understand they supply certain ford offerings. Pick your size/color/engraving and ask for the reverse lockout cut-out when you order. Quite reasonable at about $50 delivered.
Shift Knobs - EPCO Manufacturing (epcomfg.com)
Other than the pretty common panel fit issues, it's been perfect. If you remember, the initial delays were for wiring issues, panel fit, and valve train issues. I would expect it took a lot of time to re-inspect the initial production, and correct if and where needed
A dyno review I viewed today recorded 3 back to back runs at 440hp with standardized SAE correction. The operators were pretty impressed with those numbers and mentioned the 500hp may be an underated number..