The first I would do with those is see if the upper and lower tubes can be twisted 360 degrees without stopping or dragging significantly. If not, they are substantially bent. If they don't appear to be grossly bent you may be able to get by with new caps as long as the inner tube clears the dent.
Showa forks are pretty common and it would be pretty easy to locate a set in better condition. I would not use those unless I was in a real pinch.