Daniel, it sounds like you got the hub. When it comes to hardware, as I'm sure you've figured out Home Depot and Lowe's hardware isle sucks. What a freaking mess. The
John@Micro official nuts and bolts rule is that by the time you figure in gas, time, dealing with crappy selections often with limited crappy grades and almost never any metric stuff, not to mention marginal service and often high prices with sales tax... it is a losing proposition to spend your evenings or late nights driving around trying to find quality hardware locally.
The quick way to get those black metric steering wheel flat allen screws is to check around your area for a specialty fastener supply, go to a real home grown hardware store with a real hardware isle, or simply order what you need online. I believe with the Taitec hub I used 1.5" or so, longer than what they sent with it to get a more secure mount with my R horn trim ring.
My advice long term, is to pick-up a fastener ruler so you can determine the pitch and length and work yourself into the habbit of ordering everything you need online in advance via the internet. You can even print one out
here. In the short term for your car show as temporary solution, just back them out, then hit the heads with some flat spray or touch-up paint out of the car.
