Ah, except for deer farms, and I don't know where you are, but we've actually got a couple of deer farms down in Victoria. The only problem is, as you said, the require you to buy a whole lot (the entire animal, I imagine, if you want it done kosher) however - if you can get a few friends together to split the costs, it's all good. :)

I don't keep kosher anymore (lol as you can probably tell from my below comment) but yeah, kosher venison for a special occasion is doable. :)