subs with stock head unit

i bought my 2013 tacoma that has the non-entune stock head unit (still touch screen) i plan on putting a sub on it, but every headunit i've ever messed with had L-R audio output cables to go into your amp, and this stock head unit does not. is there any way to rig somekind of converter to it to get your L-R cables?
(i'm trying to pay off the truck before i get a new headunit.) any help appreciated! thanks.

 

The easy way is to tap into the stock speaker wires in the back (or wherever you want) and use a "high to low level converter". Some amps have this option built in "high level input".
You'll have no problem running a sub this way. Make sure you post pics.

 

thanks man, i appreciate it, and will do!