GPS Central  carries them, but currently out of stock.

Rob, check out these power bars as an alternate.  https://k9jeb.com/

Variety to choose from. I built 2 of the V.5 MAX boards. Had some soldering challenges with not enough mass in iron so it took too long heating heavier parts - overcooked LED's. And the board printing & wiring diagram had an error - LED polarity reversed. But a larger mass iron & corrected polarity finally came together. I haven't figured how to do the cut outs for all the components, so the board isn't as smooth looking on the top.

I can give assembly advice if you get one.

73

Wilson