I SO fully agree about the tentacles!!! It was so disappointing for a long long while around here to find that even if you could locate fresh or frozen squid at all, it was always just the cleaned "tubes". Luckily, all the cleaned frozen squid I've been able to buy the past year or so has included the tentacles as well.
The only problem I now run into is that when buying frozen - normally the only way squid is available here - one doesn't know until one defrosts & opens the package whether one is dealing with full-size squid suitable for slicing into fry-worthy rings, or tiny little "baby" squid (2"-3" long tops) which are just PERFECT for sauteeing & adding to a spicy red sauce for topping pasta. So these days when I buy it, I just plan for either/or & don't make the final decision until I've opened the package.
But tentacles are, luckily, always a part of the package regardless of the body size.