Are you asking about how to make new half races or if there are any published? I'm not planning on buying the book you linked, so I don't know what's in it.
Strictly speaking, it'd be pretty easy to make a bunch of half races with formulas. My biggest hesitation about this is that as written, the half-elf is probably the weakest race in the PHB. It has the problem of not really being as good as a human (no bonus feat) or as good as an elf. The only advantage it gets is a +2 bonus to Diplomacy and Gather Information.
But yeah, it wouldn't be that much work to create a dozen or so "common" half-elf races, balanced how you like. If that seems like too much work, or you want it to be robust, you could come up with a list of abilities that you always add as a half-elf. The trick would be figuring out what to remove from each other race to balance it.