This has probably been brought up before, but i found these (http://www.ebay.com/itm/400662208211?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649) while digging around on an American Galant website which seems to suit the 380s Speaker Plugs perfectly.

Does anyone know of a Chinese version or a cheaper option then the American ones?

Also found some UK ones which look the same.
http://www.ebay.com.au/itm/Vauxhall-Agila-2000-Speaker-Adaptor-Plug-Leads-Connector-Cable-Pair-/252250329025?hash=item3abb4a8fc1:g:XQwAAOSwIwhWScd H

Why do you need such a thing?

Why do you need such a thing?

For people who aren't confident with Wiring and/or people who change Audio often i guess(my mate has changed his car speakers 4 times now).
I still personally would've preferred these instead of cutting the connectors off my wires.

Just run new wires

Leave the connectors there and Solder on to a bit you bared (Tap into ) back on the factory wire.. Much cheaper... Then keep you OEM Plug in there, just tape it up to protect it...

In fact a soldering Kit will cost about $20, I got another from Jaycar on sale not long ago..
Just watch youtube and practice a little... I'd suggest a newbie join the wires in an inch apart to lessen the chance of a short...

And as as for changing speakers 4 times, Improving the quality of the install will have much more dramatic and improved effect than swapping out speakers... It would have saved him a few dollars as well..