I ended up ordering a whole set of replacement stainless steel spacers from McMaster. Here are the part numbers and links:
V-Wheel spacers: 92415A742
http://www.mcmaster.com/#catalog/119/3229/=or7kupMotor spacers: 92320A212
http://www.mcmaster.com/#92320a212/=or7lm9not sure where these go but I ordered them since they were on the BOM: 92320A213
http://www.mcmaster.com/#92320a213/=or7m2tI got them yesterday and the V-Wheel spacers do in fact fit what I presume are the #10 screws that came on my RRP kit. I went ahead and ordered new spacers since a few of my nylon spacers that came with the kit were tightened so much that I could tell with just an eyeball that the v-wheels were sitting at an angle. The new stainless spacers are a larger OD but they are about the same OD as the nuts so I don't think it will be an issue on the bearings. I installed them this evening and I really like how solid the v-wheels feel. The spacers fit perfectly on the screws. Here are a few pics.
Some of the bearing I got in the kit seem like they are a little easier to rotate than some of the other bearings. Is this normal?