Try using kangaroo mince from Coles or Woolworths. It comes in a 1kg prepacked bag in the fresh meat section. As Sarah recommends, it's very low fat (around 3-5%), and cheap $6.99kg Also a lot more environmentally sound.
I like to make it up into a sauce before rehydrating. The bag it comes in is also pretty good to repackage in, provided you wash it out well.
If you Google "Rod Lawlor"+Kimberley, you should come up with a trip we did up north. This included lot's of dehyd meals. Minced roo and minced chicken was my protein of choice.