PARTS FROM AUSTRALIA:
General steel product
http://bluescopedistribution.com.au/steel-tuberhs
Acme Threaded Rod
http://www.dnsales.com.au/Product/acmescrewsandnut.html (12 Feet)
https://www.fixplusaustralia.com.au/products/socket-products-threaded-rod.html
http://www.cncshop.com.au/index.php?main_page=product_info&cPath=24_38&products_id=127 (1.6 m)
https://www.tea.net.au/ProductCategoryModules/Specific_Product.aspx?prodid=136&cid=81
FLAT PLATE,
http://www.midaliasteel.com/products/flat-plate/
http://www.melsteel.com.au/shop/plate/plate-3mm/
ROUND BAR
http://www.midaliasteel.com/products/round-bar-and-square-bar/
http://www.melsteel.com.au/shop/round-bars/round-bars-6m/
Woodwork T-slot Track
http://www.carbatec.com.au/veritas-516-x-18-t-bolts_c21014
MDF BOARD
Alpine 1200 x 600mm 16mm MDF Standard Panel
http://www.bunnings.com.au/alpine-1200-x-600mm-16mm-mdf-standard-panel-_p0590045