Autozone rents out a tap and dye set for free ( you get money back when you return the item )

I used once on a Nissan oil pan, just tap it to a bigger or to a different size plug

A fast and easy fix but I don't recomend it for a long term use is the rubber plug they sell at some of auto parts stores it just gets pushed in and it have a expanding nut on it

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2003 GX470
1998 E300 3.0TD
2002 Dodge 2500 4x4 cummins
1998 Dodge 3500 5 speed Cummins