I tried printing out a section of the belt last night. I was a failure.
I had planned on using a multi-rib v belt just like the car originally came with. However, printing a pulley with ribs on its face is a real trick because the printer can't print at angles lower than 45 degrees off horizontal without putting support structure in place. Well, these rips are 10 degrees off horizontal. So, it printed support structure and it was nearly impossible to remove being wedged between the vs. I'll get some pics to show what I'm talking about.
So, this morning I talked with a friend at work who also has a 3d printer. I told him what I was doing and we talked about doing the pulley in a few different pieces. Then, he suggested changing belt types to a cogged belt or timing belt. This makes 3d printing a lot easier since the ribs go the opposite way.
So, I'm planning on switching to a Gates GT3 style synchronous belt. The new belt will be cheaper. It'll also be smaller and more efficient.