I did that on my TYC's when I first got my celi. If you can get out the broken stud then you can just use a standard screw for it. I actually had one TYC with two of its studs like this, I just worked at it until I got it loose then used a self tapping screw when I secured it again. Once the cover is on, nobody knows the difference.
01 gt-s - owned since 2002. 197,000 miles still daily driven.
Vintage Gamer - Will trade OEM and aftermarket spare parts for your old Sega and Nintendo carts.