Jim, use the internet, last time I needed a small QC I found it online at 20% what a supplier wanted. The name should be on the QC, They have both the open and closed type. I was lucky and found a supplier in Seattle and cost $4.95 to mail it to me. If you can't find one , JonDons catalog has great pictures and listing of those type of small parts...
And Yes, check it out localy first