[Many thanks to Cefiar on the RepRap forums for referring me to the suppliers I used to aquire the bolts, bearings and motors for this project.]

I spent most of today running around town picking up various bits and pieces. Bolts and nuts were bought from CostLess Bolts for ~$100.

(Note this photo has the bearings as well, I took it a few days later once they arrived in the mail).

Threaded rod was purchased from Bunnings for about $30. They don't look very nice, and they were quite tight so I've had to clean them up with some CLR. They should be adequate for the job though [Edit: CostLess Bolts sell BZP threaded rod, for my next machine I'll buy it from them instead].

Steel bars were purchased from Home Hardware for about $10. I originally bought some bars from a local steel specialist but when I got them home I noticed they were bent and covered in a rough mottled pattern. Buyer beware!

Nichrome wire was purchased from Dick Smith for about $5, I also picked up some micro-switches for a few bucks each which I plan to use for the end-stops in place of optos.

I've managed to salvage a small 200W power supply from an old shuttle PC. Unfortunately it can only deliver 120W @ 12V...that's enough for the 60W Mendel but not a 100W heatbed as well. That said, I read on the wiki somewhere that you can get more accurate control by using two heater circuits i.e. one that's always on and another than you control with PWM. What I might be able to do is run 50W on 12V with a constant supply and the other 50W on 5V with PWM.

I'm stunned at the disparity in pricing between different bearing manufacturers! The store I went to today, a bearing specialist no less, tried selling me FAG bearings for $8 each, that's over $400 for the full set! In fairness though I should point out that they seem to target the automotive industry and their bearings are very high quality, far above what's needed on this project. I decided to instead ordered in my bearings from AusXMods. Total cost: ~$70.