[horto]

dunno if this is suitable for mechbox applications, but...
16 AWG red http://www.hobbyking.com/hobbyking/s...idProduct=9681
16 AWG black http://www.hobbyking.com/hobbyking/s...idProduct=9680
14 AWG red http://www.hobbyking.com/hobbyking/s...idProduct=9678
14 AWG black http://www.hobbyking.com/hobbyking/s...idProduct=9679

prices by the metre

hobbyking has all sorts of cool stuff for batteries, connectors and chargers. i've ordered a lot from them lately.

for plug and play applications, airsoftparts / airsoft depot often have fully (silver) wired trigger switches terminating in the appropriate connectors... specifically what you may be looking for is this: http://www.airsoftparts.ca/store2/in...oducts_id=1642

i also found these
http://www.evike.com/product_info.ph...ducts_id=33593
http://www.evike.com/product_info.ph...ducts_id=27983