You won't save any money, but it's never a bad idea to have a way to replace parts.

What I always do is to save the empty frames from the die-cut parts. This way, if I ever need to replace a part, I have the frame it came out of to use as a template. If I never need it, I didn't waste the time of making a template. After all, why make a set of templates if you're never going to need them?