I thought I would have a look around for a local supplier for the same product. After playing email hockey for a few days I got an answer from a supplier, Sinclair and Rush. I think they are based in Melbourne but probably ship from all capitals. They can offer 4 foot clear heavy wall tubes for $2.20 each. Tubes are 7/8 or 24.7904mm with a wall thickness of .5588mm. No mention of min order qty either. Caps can be supplied per box of 100 for $56.55 per box. Unsure if they are the caps with the hooks or not. Freight to PostCode 2650 was quoted at around $20 to $30. That work out to approx. $2.25 per 600mm tube with 2 caps. I will try to get some more info on them today, might be able to get them cheaper with a larger order.