you mean the torx screw with a security pin?
Never done it, but it definately is feasible. Most of these replacement screws are available through a decent hardward store or a GRAINGER catalog.
Go for it!
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger