you could also use the "plain wooden shop sign" and find a custom design of a crossing sign to put on it !! im sure it has been made before ,, and if you cant find one by looking it up in the portal ,, you may be able to find some better quality ones that have different titles by searching on pinterest or another search engine.
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if your island aesthetic is more based around wooden items ,, i personally find the shop sign to be a better idea aesthetic wise rather than the illuminated metal stand ^^ however ,, it is your island ,, and the other idea is great as well !! you can decorate it however you see fit <3