You would be doing that,

buy something cheap and try to modify it or, get some kind of 1/8" aluminum rod and try to braze weld it together. A simple MAP torch could get it hot enough, then you just need to source some brazing rod for aluminum. I have never done this but, I think it's what people were doing when they couldn't tig weld stainless rod.
I contemplated this for a project, but I was going to use stainless rod and tig weld it.