I put some Western Bellows on my Ansco, and they are so supple they are a pleasure to use. The old plastic ones were getting cracked in the corners just a bit, but there is more to a bellows than keeping light out. With the Ansco you can just send in the old bellows attached to the bellows frames if you do decide it makes sense to go that route, and this keeps the shipping costs to a minimum.
I'm not sure I full understand the fouling issue while unfolding. That is one stout hinge on the Ansco—is it bent, or the rail itself twisted?