Yep Wedge. I've done it on the cheap and bought iodophor in bulk.
The product you are looking for is "Alfa Laval Agri LF12 Milking Machine Sanitiser" (Might be F-12, instead of LF-12 can't quite remember). You can buy it as a 25L cube for about $125 (=$5 per litre). Therefore you really need to find a few blokes to go in with you on a cube. From my experience this is the smallest container you can buy it in. We asked around all the rural suplies places and ended up finding some in Devonport (Tassie) but the name of the place escapes me (this is pretty much a one off purchase of sanitiser, you won't be buying much more after this

, could even last the rest of your homebrewing career). It lasts for ages.
Anyway, if you search around a few agricultural supplies places or dairy specific places you'll find some. Or alternatively if you know any dairy farmers then you could ask them if they have and around that they are willing to part with (this is actually where we go ours in the end, my old mans mate had some he was willing to give us so we each got a litre and a half, but now I'm kind of wishing we'd got the full 5L each anyway).
So if you can split one up with a few blokes this is definitely the way to go. Your going to use it trust me. Iodophor is great stuff, fantastic sterilizer. Use at 12ppm (0.7ml per litre) with a 2 min contact time at this concentration.
Cheers and good luck
Justin