Dr, length is 1-5/8" and is a #6. I have done this very thing you suggest, chucked in a drill and spin it but often they're kinda stripped (where the phillips head screw fits).
Northvibe, like I posted, I can't find it in the Taxi manual or any other System 11 manual either. I've had success with Marco listing numerous other #6 or #8 size screws, just not this one.
FatPanda, I'd agree, I most certainly can make something close, just looking to see if it really is still available. If it is I'd still like to purchase since I'll be doing a bunch of playfield swaps in the near future. I just did a Bad Cats playfield swap and currently working on a Taxi swap. Hence the reason for the post.
I appreciate the replies. If anyone knows specifically where to still find it, please let me know.