I'm alum now, so am unsure of what my chapter would buy, but these are places you can get the following items at no minimums for your current chapter (or you personally, as I did many times!). You can buy pretty much everything individually:
Lettered Flip flops
http://somethinggreek.com/shop/shope...+Flops&id=2428 and http://www.marilynskeepsakes.com/a-g...ed-flip-flops/
Cute lettered pens, pencils, cups, dry erase boards (Bid Day items)
www.vistaprint.com and http://www.marilynskeepsakes.com
Notepads
www.vistaprint.com
Welcome Mats-
I haven't found this yet and would love it. This site has pillowcases and throw blankets, though: http://www.customgreekthreads.com/category_s/51.htm
Coin/ID holders
http://www.marilynskeepsakes.com/a-g...ith-id-holder/
Keychains
www.vistaprint.com
Window Decals
www.vistaprint.com
Bumper stickers
www.vistaprint.com
Notebooks
www.vistaprint.com
Picture Frames
Magnetic: http://www.marilynskeepsakes.com/a-g...rority-frames/ Wooden: http://somethinggreek.com/shop/shope...+Frame&id=1501 Metal: http://www.marilynskeepsakes.com/a-g...picture-frame/
Pins
Do you mean buttons or like jewlery pins? If you mean jewlery, check through the IEB website. If you mean buttons, Zazzle.com is amazing. Check the recruitment thread for the ones I ordered my active chapter.
Koozies
http://www.greekgear.com/greekcancoozie.html
Water Bottles
http://www.marilynskeepsakes.com/a-g...-water-bottle/ and http://www.marilynskeepsakes.com/a-g...water-bottles/
Lanyards
Have not found
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Basically, for any paper products Vistaprint.com is the way to go. It's cheap, quick, and pretty nice.
I adore Marilyn's Keepsakes for anything else. I've gotten about 1/3 of the sorority products and still adore all of them (or passed them on to girls who love them equally!)
Also, since this is a merchandise thread,
www.gonegreek.com has good high-quality clothing!