Hi Joe,
We are definitely the poor cousins of Home Arcading here in Australia and it is a very difficult task trying to find items like t-moulding in the required sizes and colours.
Firstly I suggest that try a company called Consolidated Edgings. Their website is at
www.consolidated-edgings.com.au and they MAY be able to help with 16mm t-moulding. They often have clearance stock so you might get lucky.
Your best bet would be to grab out the Yellow Pages and look for local Cabinet Makers and Cabinet Makers Supplies. Stick to the larger companies as they are more likely to have more variety.
Don't be surprised if Suppliers try to sell you a full roll (usually 100m or 150m!) as many insist this is the only way you can buy the stuff, whereas the actual Cabinet Makers would probably be happy to sell you however much you need for around $2 to $3 per metre.
Also, if you want a colour other than black you can pretty much forget it.
Your only other option would be to become friendly with some of the US based BYOAC regulars and see if they would be prepared to ship you some if you sent them the $$ to do so.
Feel free to drop me a line if you need to know anything else as I'd be happy to help you!
Cheers,
ChrisW