Pulled my bike apart a few days ago to do the camber mod. The closest washers I could find were 7/8 and Iam not sure if my bike has different ball joints or not but I went to fastenal and ordered the bolts they are 14mm by 1.5 pitch thread. Matched up perfectly.  I got 40 mm long bolts and will be running 3 washers on each side. It's not together yet so once it is depending on how much it's cambered I may take one out of each side. I didn't go with the camber kit because money is a little tight at the moment and may be for a little while as my wife and I are expecting twins in a few months so most of our money is being dumped into the house and being saved for the babies.