Fabricating the front panel will be difficult without the correct tools and some woodworking skills. If you want to replace instead of repair, I suggest contacting Doug Huse (Let's Play Pinball) and see if he will sell you a front panel.
If you take your time, the front can be removed without damaging the side panels. You could also take the front panel to a local cabinet shop for fabrication. Or take the whole cabinet to a local cabinet shop.
Patching may be your best option, provided the cabinet is still structurally sound. Structural integrity is hard to determine from the pictures.
No matter which option you choose, you'll need to fill, prime, & paint.
Good luck with your project.
Steve (in Escalon, CA)