Where are you guys finding / buying the electrical connectors that work on the Pontiac G8?

For example, the trunk release switch connector is OEM 7123-9610 - if I want to tap into that line, I'd rather make a short line with a male and female connector that is plug 'n' play (because it is easily removable and because I hate wire taps with a passion).

Also, how can I cross reference the OEM part number to another standard? part number?

I've looked at digi-key and other suppliers and come up empty.

Thanks for any help.