Thanks for the prompt and informative reply, gdenby. I experimented a bit and created/saved one but it leaves a bit to be desired in that lengthening and shortening it distorts it. Mine, cumbersome as it is, is preferable.
Now, I need to experiment with your suggestion, "On a Mac, you can also insert arrow symbols from the character map utility, and convert those to vectors for further manipulation."
I found them. ➛ I frequently use other symbols from the utility but have never looked at the arrows.