Front Differential Drain Plug

I have two problems from one source? Does any1 know how to take off a striped front diff plug? My second problem where can i get a new plug for it besides the stealership? i have already tried a reverse screw, but they seem to small too grip the insde. My truck is 02 DC limited 4x4 TRD.

 

i have a question to add to
where and what size wrench is it to get it off

 

i dont know if you can get the plug anyware but the dealer but i have used tight vicegrips to get plug off but i always make sure i have the replacement.

 

I only have a 2WD, so I don't know the size. But I have a set of these and they work very well for problems like yours: http://www.sears.com/shc/s/p_10153_12605_00952062000P?vName=Tools&keyword=stripped+bolt+removal+tool

 

id get it from the stealership as much as i hate saying it

 

heat it up alttle with a torch and use big visegrips