[Hans471]

If you want something "fancy", not hard to find lots of options like these on Amazon:
Battery terminal cover

 

[Hans471]

Go look at your Vstrom's battery and you'll see why those aftermarket caps/covers won't work.

Vstrom battery terminals in general aren't round. Including the battery I have now, which is a Duraboost (Cycle Gear store brand).

The terminals aren't raised above the top of the battery, and are just about square. Photo to follow.

The more square-shaped covers still won't work, because of the cable.

The positive cable doesn't come in from the side, it comes up the side of the battery. That vertical cable approach is why the OEM positive terminal cover is special, and the biggest reason the aftermarket covers won't fit.

Well, as I noted, there are MANY options listed on Amazon, this was just one example. Also, these various covers are flexible and its not hard to make them with with a small amount of imagination. Been there, done that. Besides, one can always go to Suzuki, or other brands of motorcycles, and find a factory replacement part. As the old sailors say, "Any port in a storm!"
Good luck with it......