It always bothered me that there isn't a manufacturer list too. I'd like to buy 50kg of plastic and pay manufacturer price for it. The essence of reprap is not commercial stores but DIY stuff
Matt,
The plastic your parts were printed with was from reprapsource.com. You might want to start with PLA as it is easier to print with without a heated bed.
I have an UP! 3D printer as well as the new Afinia 3D printer and I have great luck with the Octave 1.75mm ABS filament. You can get it from their website at www.octave.com or on Amazon.