Oh man I spent hours looking for that expansion board, I can’t find it anywhere, there was even a board to mount the drivers sideways on the ramps sheild for better cooling I can’t find that either. I know it was a link from the reprap wiki that got me to the product but I can’t find it to save my life.
I did find a few other things. I will drop the links here so I don’t lose them again.
This one is an expansion that makes it easy to add as many as you want daisy chained.
Easy series plug, gotta try this out should be the best option actually. or I could just stop being lazy and hand wire one up.