Fender apron Cutting Question

Well Finally had time this afternoon to to some work on the car. The LH fender apron I got is a Ford peace that I got from Johns Mustang. Nice panel. But it does not have the holes cut on the top for the fender to connect to. My question is, what would be the best way to do these holes? I tried my pneumatic drimal type tool, and can tell there's not much chance of doing it this way and it coming out nice. Anyone have any suggestions? Take it to a machine shop?
 
UNVMATT said:
Is it for your 65?
http://www.mustangsunlimited.com/itemdy00.asp?T1=56055+01
Check this out. This has holes for fender bolts.

The repro aprons for 67/68 dont have holes though.

The Dremel method is probably a good approach. If the mounting holes were a perfect circle a drill might work better but if my memory serves me correctly they are more of a rectangular shape.

I think it has a square hole for the nut/clips and an oval hole for the bolt. the oval hole you can do with 2 round holes and then file out the center. the square hole you can do with a home made chisel, grind a square chisel and use a block of OAK for an anvil and it should cut fairly easy.