Hi and Welcome
Ryandill,
If you search the archives, you'll find several threads on repairing damaged contacts.
Generally speaking, it's next door to impossible to simply swap unused contacts from one place to another. Doable, but basically, if you have the skills to do that, you have the skills to repair the damaged one/s.
I'd get a used timer in good condition, personally.
A few thoughts, though, if you have no choice. One, if you can get the points working adequately, you can swap in a load relais which draws very little current through the contacts to provide power to whatever circuit you need.
What's not working? That might help someone here to help you.
Again, welcome!