The total should be around $25. The enclosure is $8.45, the drilling charges are about $5.50, painting is about $8.95. They drilled 4 small holes for the long, thin screws and that holds it in place. If I remember correctly, I used a couple of pieces of electrical tape as well in spots where there wasn't much clearance.
The web site says there's a $25 setup charge for custom drilling, but I don't think that applies since they have the template already. I paid this charge (and would gladly pay it again given how tight the tolerances are for this job).
The following user(s) said Thank You: Ray, BowDown
It very much looks like @ja_hurtado's original design. I extended the hole on the bottom to make it easier to connect a USB cable to update the device programming.
Oh, and as a reminder, the second hole on the side is my own, so don't blame the poor workmanship on Pedal Parts Plus.