In my past experience yes, but they are all junk. sadly. In one of our houses we just bought new doors. They make very inexpensive hollow core doors, if you were trying to save money. I think I also just made standard door knobs fit the modular doors in the past if I had too. I think most modern door knobs have 2 settings for depth. When you buy the knobs you can set them for shallow or deeper depth to the jamb.
we have had to buy mobile/modular unique parts here before. Like hinges, if yours has the lightweight ones. (all of this was because we were selling and not wanting to sink money into upgrading, which needed to be done)
http://mobilehomepartsstore.com/?gclid=CKHvupb3msoCFQuSaQod1i0Fuw