xc60 Ball Joint help

[jdwme2]

I was wondering if anyone knows the specs on the lower ball joints. While doing some work on my vehicle one of the lower ball joints snagged and the rubber boot got a little rip in it. I'd rather not replace the entire control arm if I don't have to and I've seen people talk about just replacing the rubber boot on other cars.

Has anyone done this on an xc60 before and if so where did you get the new part? Sadly I don't have any way to measure it accurately right now.