I found this while browsing eBay. I have this exact same bike poncho and I like it a lot. I have pictures of myself wearing it on my profile page.

https://www.ebay.com/itm/Grundens-Bike-Poncho/113917820229?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649