Slash McCoy
I freehand dog rockets
A saddlery would be a great place to get some really fancy D rings, MAYBE some chicago screws. You will want to try different lengths but probably 3/16" or 1/4" depending on leather thickness. But Tony's strop will do you just fine.Tony's strops are very good quality and I highly recommend them. The only problem is that the cost to ship them to AU is about the same as it is to buy one.
Saddlemakes are your best bet to source stropping leather at a reasonable price. They can also help you in sourcing strop hardware. We have a good saddlemaker in Mareeba.