Thanks everyone. I really appreciate how helpful you've all been. I've sent an email to Ms. Stuehmeyer and with luck I'll hear back from her. I also checked out the kilt straps. I'll probably get straps as a quick fix since my son can't wait to wear his kilt, and the local Highland Games are this weekend. And I'm hoping Ms. Stuehmeyer, or someone she recommends, will provide a more permanent solution.
I'm really very impressed with this site, thanks again!