I don’t think I’ve ever seen a 50 mL mini-bottle of Hendrick’s, but I googled it, and they do indeed make them!

I usually find the price of Hendrick’s is roughly the same as the others at the store (occasionally a few dollars more), and while it seems to be considered a premium gin in most airline lounges, I don’t know that I’d really consider it a huge step up from the other gins mentioned.