Hi, I don't know if you are still collating data for Gtv's being broken or scrapped, but if so I can tell you that S291CEB is no more. It was a Vela Blue T spark Lusso ph 2 with tan leather and a dealer fit Hollandia elec sunroof. It had been 'lightened' (pulled roughly to pieces) for a track day, and gearbox had blown up. Great shame. In the course of my work I have also broken up a LHD '96 rosso t spark spider (fire damaged May '04), a silver GTV T spark '97 R plate (snapped belt Oct '09), a green '96 spider ts P95EGM (Crash damaged April '04), an Atoll blue '96 P plate spider ts lusso (stolen recovered Feb '04) , a 97 R plate rosso Gtv ts (snapped belt Dec '07), and a yr 2000 rosso Gtv ts V838FHS (snapped belt Mar '08). I also repaired several 916's for customers, most often after belt failures. Certainly an Achilles heel it would seem, although we can all read a service interval..
I have owned YH54NXW since 2007. It's a met. black JTS lusso with red leather, which according to your spreadsheet seems fairly rare. Still a beautiful shape.