Old post I know,,,,,, but.....I'm looking into this. If aftermarket prop vendors can supply them they are not so custom. A machinist and stores manager for a time I know who to ask. I'll post back.
This is why some break screws off. The screws are not supposed to be torqued down. They have Loctite on the threads. Just make them touch and stop. Thats why they say use new screws.