Ok well there is ebay, computer shops and old computer power supply connectors to name a couple of starters...
Unless you recycle, I think you will be up for a tad more than $1 a connector there my solderless friend.
I bet if you choose a box to look in, then pick the complete opposite to it, your connectors will be in there. Lol for some reason when I lose something in a box, its always the last one I look in!!
Or the first one, underneath something else haha