alpha7, we have missed you! Glad to see you back. It's been pretty quiet around here lately. I guess folks are taking a break for summer.
Yes, SBI! has an add on called Store Build It!. It's a separate fee though. I am not completely sure how it works because I've never used it but you can see a sample of how it works at this site.
www.jugglenow.com The owner Jim Nelson sells juggling balls from it using Store Build It!. You may want to drop him a line and ask him about more specifics.