LoL.
Dave, you don't need a trike.
Performance Ultra bibs are on sale for $89 right now. I owned two pair of these. They are pretty good, not the most durable but they will get you through this year and well into next year without any problems and will allow you to ride that century without killing your butt. Performance Bike @ Town Center probably has them in stock.
https://www.performancebike.com/shop...tra-18-11-5363
-Tim-