The Bintel stuff is IMO simply Dr Clay's recipe, which has a minute amount of Photo Flo solution in it as well as IPA and Windex (the blue stuff). I made some up before Bintel started selling the stuff, but it's quite an expensive exercise and you end up with enough solution to last a thousand lifetimes. If you're using IPA it's important to get 100%, the 65% "rubbing alcohol" simply isn't pure enough and will leave residues. It's worth reading
Dr Clays guide to cleaning optics, even if you buy the Bintel stuff. It's really important with EP's not to saturate the optics, you're better to dab the cleaning solution on to the surface. If you saturate the EP there's a good chance you'll end up with cleaning solution between the elements and possibly permanent marking.