Where to find tiny screws?

I'm trying to make minor upgrades to a knockoff knife and one of the obvious upgrades needed were the screws...

I'm trying to find replacements but finding an assortment of quality screws is a little harder than it may seem...

EDIT: I found these but I'd prefer hex screws or maybe philips for my "Emerson" wannabe.

EDIT: http://www.smallparts.com/b/16403521...FSQeDQodomPJbg BAM

I'm still not sure how to determine the proper threads though unless I just rethread the knife myself.

i was gunna say to the title.. tiny people..

Maybe this can help?
http://www.roton.com/identify_threads.aspx

http://www.mcmaster.com/