I didnt find one last time I was looking, I just used a file and some new decent chunky washers. I slotted the lower arm so the lower bolt moved to where required and played around with the position, then once totally happy (I.e. drive around on it a bit and re measure the camber) I put 2 spot welds holding each washer in place. Has worked fine on 3 different 360's for me and costs very little to do. I also use a home made camber gauge made from a kid's protractor, some cotton and a small bolt! You do need a level garage or a good datum point to work from I.e. a standard car which you can use to find how level your garage is.