Thanks for reminding me. There is one in Fisherman's Wharf. Nearby on Pier 39 Fudge House has caramel apples also. I have read that while Fudge House has more varieties, the apple itself is tastier at Rocky Mountain.
Charles Chocolates makes those caramel apples for Williams Sonoma. Sometimes they carry them in the shop I think. You might give them a call. They are in Emeryville. How far will you travel? I know a source in Napa.