Pocket Fold invitations----I waited too long

Hi ladies;
I have been undecided about the invitations for quite some time now, so that is the reason I waited. I am begining to stress and my wedding is in about 41/2 months. I will like to send the invitations in the next three weeks.
I knew I wanted simple but elegant invitations and also wanted the pocket fold because it makes them look classier and different (not that the rest aren't---but it is just my taste). I had been searching on this site and have fallen in love with some of the ones posted by some of you (DYI). I knew that is what I wanted, but I am not crafty at all, so I knew that was out of the question. I only need about 90 to 100 invitations, so I figure it should not bee so difficult ...well....I was wrong As I was checking the prices, I almost became sick. I am so frustated
So, to make a long story short.....I contacted the print shop Director at the company I work for, and he is willing to print the invitations an inserts for free. The administrative assistant at our offices will help me with the design. Actually, as a matter of fact...... I will make the initial design and then she will add stuff for me. Again, keep in mind that I am not looking for anything complicated....I am just doing simple, but classy My colors are ivory, black and sage green for accent.

So, I know Paper presentations in the city (close to my office) sell the pocketfold I want, but their price is $15 per set of 10. Do you think that is OK or should I check another place If so, where do you recommend I look?
I know I want the metalic/shimmery one and I also will be buying the cardstock for invitation and inserts.

Please recommend where I can buy such for a better price