I have looked in all the after market places and found everything I need but these two things:
1. right front fender extension (has a side marker light in it)
2. lower grill
Does anyone have these used they sale?

 

I dont know about the fender extension,but there are reproduction lower grilles,i cant remember the name of the company right off hand i will try and find it,i have an 81 i need the lower for as well and found them a while back,they are like $85.Another option for both parts would be ebay i see the grilles on there all the time.

 

did u try yearone,classic industries,ecklers cmaro,npd...there is alot of aftermarket companies out there u just have to look google is ur freind

 

I would check Craigslist for various cities near you, then start working farther away until you find them. I just checked my area (Oregon) and found both parts just north of me in Washington.

 

i dont kno were to get a lower grille in the plastic oem style everywhere i but you can do like i did and get a billet set for cheaper than a plastic one and its more durable i dont mean to sound like a salesman or anything but i really like mine heres were i got mine

http://www.camarocentral.com/product_p/gri-757.htm

 

they got the fender extension they only have used ones rite now but you can call i bet there pretty cheap
here they are ones the right and ones the left

http://www.camarocentral.com/product_p/she-996.htm

http://www.camarocentral.com/product_p/she-995.htm