OK, yep the Niles unit would be the exact solution I was looking for ... for maybe a quarter of the price! Even accepts 14-gauge wire -- which is what I have.
I originally looked at the euro-style terminal strip, but is it a barrier strip -- which I take to mean only connect the two opposite points together? Or does one wire connected to any of the twelve positions "share" with all other eleven points?
I can't tell from the image, and I haven't seen one up close.
If the latter, then yes, I think I could use two strips cut in half (left positive, left negative, right positive, right negative). Five connection points per strip.