Oh man- that pic's a heart breaker! Surely they could find a salvage yard with everything you need and save you a few bucks too? Gotta be a recent wreck with just front end damage.
If not, I'd be patient and wait for an OE part. That NPP is worth it IMHO.
With the mods I've made (Borla 60606- (2nd cat delete), crush pipe delete) it would be too loud without GM's amazing valve system to keep things on the "down-low" with small throttle openings and then still be able to raise Cain when you put the hammer down!
Now with GM's CAI and Velossa Tech's big mouth ram air, its too much fun to be legal... which I guess it isn't, but thanks to the NPP valving if you stay smart nobody knows! That is til you turn on the RevMatch and wake'em up...
Good luck!