I don't know if any of you were still looking on where to order pocketfolds from, but I found a pretty reasonable site at Envelopments® Mix and Match Design Line - parts for custom invitations and announcements. I think that if you order more than 100, you get a 10% discount. They have all kinds of stock from matte, metallic, textured and patterned and more. I bought the 4x5 metallic pocketfolds in rubelite. They're $1.50 each before the 10% discount.
I ordered metallic cardstock from PAPERWORKS - Paper Isn't Our Sideline... It's Our Only Line!. I'm paying like $30 for 100 8 1/2 x 11 coverstock metallic paper in quartz (like a white color) and I can get 4 from each sheet because I'm cutting them. Super cheap!
I also ordered my envelopes from Specialty Paper, Envelopes and Invitation Supplies by Envelopemall. Theirs comes in a package of 100 and the metallic ones I bought were $17/package also in quartz.
Some of the same websites sell the same products, but the paper may be cheaper at one, but their envelopes were more expensive. That's why I bought everything at 3 different places, but I'm saving more money that way.
Anyways, hope this helps someone out! Good luck!