A few other parts store clutch kits come with that plastic throw out bearing retainer as well. I installed one on a V6 Dakota a guy brought me once. 3 weeks later I got to replace he plastic throw out bearing. The parts store replaced the entire clutch kit and didn't want the old one back. So I have had a new in the box clutch disc and pressure plate sitting here for about 3 years now.

Its also possible the input shaft front bearing collar is worn as well, this stuff isn't getting any newer. Gene