As I think of more materials, I'll update the listing.
After-market springs, o-rings etc -
RS Components - 13Kg Longshot/Triple Shot Springs - 5 pack
http://black-tactical.com/store/weapon-accessories-foam-gun-parts-c-69_30
Lubricant for o-rings -
- Model silicone grease from RC Hobby stores
- Fix-a-tap lubricant from Bunnings
Un-protected 14500 Li-ion batteries and chargers -
Blue foam, dart tips and PETG -
http://www.oznerf.com/t2991-inf0rm3r-s-ordering-system-blue-pink-foam-silicone-snap-tips-petg
Brass tubing –
www.citymodels.com.au
www.hobbyco.com.au
Can also be purchased from selected Mr Toys Toyworlds. They restock every month though, and sometimes they don't over stock so it's abit annoying. Hobby stores in general have them, so it would be best to google your nearest one. However, websites are good too if you can't be bothered leaving the house.
SLA batteries and charger -
Batteries: http://www.altronics.com.au/index.asp?area=srch&search=sla&option=and&list=0&pg=1&sort=code
Charger: http://www.altronics.com.au/index.asp?search=sla&area=srch&option=and
Trustfire Batteries -
Batteries: http://www.dealextreme.com/p/trustfire-14500-3-7v-900mah-rechargeable-lithium-batteries-2-pack-19771
Charger: http://www.dealextreme.com/p/trustfire-tr-001-multi-purpose-lithium-battery-charger-12594
Battery Trays: [Search this in Ebay]AA 6V Clip Holder (holds for AA batteries / 14500 3.7V 900 mAh)
PVC pipe, cement and fittings –
Pipe and fittings:
Mitre10, Bunnings, Home Hardware, Local Hardware stores.
PVC cement:
Bostik Plumbweld Blue (N) : Standard adhesive – Plumbing stores, Local Hardware stores, Bunnings. Bostik Plumbweld Green (P) : Pressure-rated – Plumbing stores, Local Hardware stores, Bunnings.
Electrical conduit and fittings -
Fittings:
Local Electrical wholesalers/contractor’s
http://www.esidirect.com.au/electrical-conduit-s/348.htm
Conduit:
Local Electrical wholesalers/contractor’s
http://www.electricalbulksales.com.au/shop/categories/17
Conduit:
Can also be purchased from Hayman's Electrical. The good brand you should be looking for is AussieDuct.
Adhesives/putty -
Super Strength Araldite : Mitre 10, Bunnings, Hardware stores
Super glue: Mitre 10, Bunnings, Hardware stores, Discount stores, Super-markets
Zap-a-gap CA glue: Local Hobby stores.
www.hobbyco.com.au
www.citymodels.com.au
JB Weld epoxy: Autobarn.
www.jaycar.com.au
Epoxy putty: Bunnings, Hardware stores.
http://www.hardwarefast.com.au/index.php/component/cubecart/?catId=581&_a=viewCat
Hot glue sticks: Bunnings, Discount stores, Hardware stores, Mitre 10.
www.officeworks.com.au
Aerosol paint –
Export Enamel: Discount Stores, Super-cheap Hardware, Local Hardware Stores.
White Knight/Squirts Enamel: Mitre 10
Rustoleum primer/acrylic primer: Mitre 10, Bunnings.
Ironlak/Molotow/Kolour Acrylic:
www.ozgraff.com
http://www.thebutchershop.com.au/shop
VHT Vinyl Dye: Super-cheap Auto, Caltex Service Stations, Auto-Pro
K&S Vinyl Dye: Autobarn
Plasti-Kote Plastic Paint: Bunnings.
Tamiya Acrylic Primer:
www.frontlinehobbies.com.au
www.hobbyco.com.au
Aerosol caps/accessories:
www.ozgraff.com
http://www.thebutchershop.com.au/shop
Molotow Acrylic paint markers:
www.ozgraff.com
http://www.thebutchershop.com.au/shop
Cheers,