Does anyone know of a local lumber yard that sells (or could order) plastic lumber?
I’m looking for 2x10s and 4x4s. Found some at Menards but they can only be ordered in quantities of 15 (I need 18) and Lowes price was more than double Menards. 
When I rebuilt my deck a few years ago, I got mine at MPC Cashway in Lansing, by the airport. I think I remember Carter Lumber off Old 27 north of town, and Gilbert off Penn having some too.
Thanks, I’ll look them up. I am looking for rough lumber sizes and not decking (2x8x10s specifically) but we’ll see!
I ended up going with Markstaar. They had exactly the sizes I needed and even after shipping 1,000 pounds of plastic lumber, it was more affordable than anything I found locally.
Delivery was by semi-truck by the way. I live in the country and could accommodate this but I suspect this may not be an option in some subdivisions and in the city.