ServoCity sells a great little 2:1 bevel gear ratio set: 2:1 Bevel Gear Set (1/4" Bore Pinion, 1/4" Bore Spur)
I have it currently set up in my project and was thinking a 1:1 gear ratio might be better suited for my purposes. All over the site it says the 13t gear must be paired with the 26t gear. Is there any reason why pairing two 13t gears together wouldn't work? I can't see why not, but, I want to confirm with people smarter than me.