FYI I did find these on page 15 of the LMC book marked edition CSB.56 (For Blazers and Suburbans). It's on the top right panel under hood componenets, Item # 6 which is LMC Part #30-3802 for the LH and 30-3803 for the RH. They are called Hood Hinge Deflectors (assuming because they deflect water and trash out of the hinge/cowl.
They are 19.95 each and they also sell the screws for them if yours are rusty. Alternatively, I got a gallon of Evaporust and some containers to soak the bolts in and they turned out great. I'm going to take some small wire brushes from a gun cleaning kit and go through all the thread holes I can fit them in to help clean the other side of the threads with some machinist oil or something aws well.
Hoope that is helpful