Yeah, the gadget is cheap enough... But if they won't ship to where you are, it is also so simple that making one is maybe better anyway. That way you can find a piece of tube that fits the end of your pinky finger.  Not saying the commercial one won't, but I thought it looked like it might be too wide for some folk's pinky, too narrow for others.  I'm not a big believer in "one size fits all".

I do have to say that I think that if someone was practising from day one with the pinky in a good place on the hold and paying attention to keeping it there until it became habit, the gadget wouldn't be worth the bother.

I wasn't one of those people, though. LOL  I'd kind of jumped into playing, and the bow hand pinky resting on the bow was one of those things that felt a bit awkward at first, so I didn't bother with it.  Then a few months in, I was struggling a bit with steering, and also with having as much control over the bow pressure as I wanted.  Somebody put me wise that the pinky is an important control element for the FB (Franco-Belgian) bow hold, so I should work on bringing it into use or maybe try working one of the other bow holds.  Pretty much all bow holds use the pinky, sure, but in some it isn't used as independent as is required for the FB hold.

Just trying to correct it by intentionally putting my pinky on the bow, I kept forgetting about it when I'd actually get going with playing.

I'd seen a pic of the gadget and it looked simple enough to make (rather than waiting the week or two to order one and wait for it in the mail).  It worked fine.  Inside of a day or two I could tell that steering and pressure control were considerably better using the bow hand pinky than without.  Inside of a few more days, I didn't even notice the gadget was there.  A month or two later, I took it off when cleaning the bow.  Didn't put it back on, and when I went to play without it, the pinky had acquired the habit of being in a good spot on the stick.  I didn't notice it taking any "getting used to" the gadget not being there.  So it got tossed into the accessory compartment of my violin case.

A couple months ago, my autistic son started acting interested in looking at my violin when the case is open.  When I'd get him to pick up the violin and bow to give it a try, he'd usually wrap his whole hand around the frog, in a fist.  So I got the gadget back out, put it on the bow and showed him that his pinky goes there.. Now if he picks up the bow to look at it or try a note on the fiddle, he picks up the bow in a reasonable approximation of an FB hold.  I reckon it's a head start, if he ever decides he wants to learn to play the thing.  I just have left it on for now, since it doesn't actually interfere with regular playing when I go to play.  Don't even really notice it's there.

Anyway, it's one thing you could try, if you want.  Worked for me.