I only suggested repairing the shell since chefmarket69 did imply that the engine seemed mechanically functional, and he likes CSX, & 95% of the shell looks undamaged. The repair suggestion is a cost saving answer.
Another solution would be to make the repair as a paint patch & not worry about a perfect paint match,see attached image. Put the $300+ to another engine. If not fully functional, then maybe it's time to sell it off for parts & search for a suitable replacement.