There are a couple of class action settlements that relate to the problem you explained. The Spencer Class Facility handles the settlement that deals specifically with plastic fittings. Check out their we site at http://www.spencerclass.com. This settlement currently offers a 10% reimbursement of the total replacement cost. You can contact the Spencer Class Facility at 1-800-490-6997. Make sure to visit Polybutylene.com to see pictures of plastic & metal fittings.
The most popular settlement (as you mentioned) was formed by Shell Oil and is administrated by the Consumer Plumbing Recovery Center in Plano, TX. This is the settlement that offers a 100% free replacement if approved. You can contact the CPRC at 1-800-356-3496 and have a look at their web site at http://www.pbpipe.com.
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