It really works out to 100% antifreeze (Prestone is $10.87 per gallon) and 1 gallon of distilled water ($1.30) produce a 50/50 mix at a cost of $0.05 per ounce. Buying 50/50 premix (Prestone is $8.87 per gallon) is $0.07 per ounce. While I can't argue the fact that premix is more costly 50/50 at a $0.02 premium per ounce I'll spluge for the convenience.
Likewise. The time it would take is way more valuable to me than the $1.50 (and that's probably a huge overestimate!) I'd save mixing it myself.
I've done the mixing myself with coolant for my car. Pain in the butt. I didn't make that mistake after I bought my Vee.
Back to the OP's point: yeah, like others are saying, anything that's safe for aluminum radiators & engines will work, and preferably silicate-free. It certainly doesn't have to say "motorcycle" on the bottle, and those that do are generally overpriced.
I was using Zerex Asian for about the first half of this year. Will switch back next time I can be bothered to do a complete coolant replacement. Would still be using Zerex, except that back in July, I was basically forced to get an unnecessary coolant replacement by an unscrupulous and/or ignorant (take your pick) dealer (details here: https://www.stromtrooper.com/general-...ing-about.html
Zerex Asian is a few more bucks per gallon vs. some of the green coolants. I went with the Zerex Asian because it was the easiest one to find that was silicate-free and not too expensive.
FWIW, it doesn't matter at all whether you use the blue Zerex Asian or the red Zerex Asian. They are identical apart from color. The color is simply to meet different manufactrers' specs (apparently, some specify the color!).