I've looked into this as the UK imports some of its Frozen Products for the US - as the virus is lipid encapsulated methylene blue should deactivate it, so there shouldn't be any worries with FFP/cryo/Octoplas etc.
Remington KM, Trejo SR, Buczynski G, Li H, Osheroff WP, Brown JP, Renfrow H, Reynolds R, Pifat DY. Inactivation of West Nile virus, vaccinia virus and viral surrogates for relevant and emergent viral pathogens in plasma-derived products. Vox Sang. 2004 Jul;87(1):10-8