LC, I can appreciate the need vs want. Happens to us all. In that respect, sounds like you're on a logical path.
Another idea is change to a powder that doesn't leak, but I don't know how much ball powder you have on hand.
Or hold out for a bit, and place a Wanted ad here for a LNL AP and see what happens. A couple have sold recently.
Of course, your Hornady powder measure solution would work well until/if you upgrade the press.
I actually already have a Hornady powder measure. I could convert it to case activated by just getting the lower and upper case activated parts, but then I would be giving up my dedicated powder measure for single loading my .308 and .223 precision rounds. I have an old lee powder measure on a stand that I could use in the meantime I guess. And when I do get the LnL, I could just use that powder measure and put the handle on it. Then the only extra piece I will have is the case activation linkage.
LC