I have no idea why Glock thinks their front sight tool is worth $35.... its a freaking nut driver... Anyway, I did a bit of research and found a good alternative, Thought I'd post it here for any others.
Wiha 26547 Precision Nut Driver, Inch, 3/16 x 60mm - Amazon.com
I used this to replace my factory front sights with the trijicon HD sights. Worked just like any nut driver should!