I've been searching all morning and haven't been able to find anything to do this. (I currently use DevalVR player to view my panos. It will allow me to export the current view, but it is only at screen resolution) Does anyone know of a program that will allow me to view my pano and export a view at the max size available so it can then be printed large?
If they're panoramas you've stitched, do you still have the final product, before it was made into a VR?
Otherwise, I don't know of a way to do so. You may be able to dump files from the Deval player, but I wouldn't count on it.
I suspect any files you could get from a viewer plugin would not be suitable for printing.
You can easily extract a rectilinear view from a 360x180 equirectangular image using PTGui, using its Panorama Editor window to select the view. Another way is to use Pano2VR, which can extract a view for editing.