Harbor Freight!
https://www.harborfreight.com/catalogsearch/result/index/?dir=asc&order=EAScore,f,EAFeatured+Weight,f,Sale+Rank,f&q=car+port
It's 10x17 and they have a few but I don't know the differences between them. It's about $170-ish with the 20% coupon. Worth every cent if you don't have...