If you scroll down on the http://www.durafix.com/
site you will see
they sell the rods only for $45 per pound including shipping.
The "Starter Kit" includes an auto igniting torch head.
I may be getting old, but I can still use a striker to light a torch.
I have no affiliation with the DuraFix company and have nothing to gain
by promoting their product. I AM very impressed with the simplicity of
the application of that product!
My hobby welder is flux core only so it is not capable of running aluminium wire.
I've tried other aluminium brazing rods. I know a skilled welder can make
beautiful repairs and fabrications using them.
For me it looked more like turkey droppings on a dead leaf.
This stuff is much more forgiving.
It is as easy to use as soft solder.