Update: Still waiting to hear from anyone at Cosworth. Looking at other pistons. Talked to the JE sales rep, he recommended not ordering the 4032 custom pistons because of my eventual swap to a 3071 or GT30R, stating they would not handle the power. Still would consider Manley/CP/Wiseco... But yeah.. no response from my original rep at Cosworth even after leaving a few VM's and emails.
I am still holding out some hope, but I simply won't beg forever for a company to take several hundred dollars of my money. Especially when it isn't even working.