Hi Mac and welcome to Permies!
Off hand I do not know much about the Troy tomahawk--is it some type of brush mower? But I would think that if you contacted a
local Troy dealership they
should be able to help you. And if you don't have an exactly local dealer, I would try calling the one nearest you.
I hope someone else has a better
answer than me, but these are just my suggestions.
Again, welcome to Permies and I hope to see you here more in the future.
Eric