Sōon Roko's version:
There's none example VB available publically yet but if you want an "easy-to-use", very little UST editing needed Spanish VB then I recommend to check out my VCV Spanish reclist here (it comes with English mini pronunciation guide, BGM guide, and base oto.ini). Please note that it's (still) in beta stage, so you might want to skip some recordings and/or add some sounds.
My Spanish VCV is about twice longer than an average Japanese VCV. If you know that you cannot record that much then I recommend to check out CVVC or VCCV instead.