WTB- GoLite poncho tarp and Montbell UL Down Parka

Looking for the last model of the Golite Poncho tarp, Yama 1.25 bug net and a current Montbell UL Down Parka in a size medium or large. Not actually sure on sizing because I don't have anywhere to try them on. I usually wear a medium in Patagonia and such but I hear these run small because they are Japanese seizes.

Do most people size up in Montbell products?

Thanks!