use a bass, full stop...
i'v never understood the logic of downpitching a guitar to sound like one.
pitch shifting anything IMO makes stuff sound like shite.
there is hell of alot in the design of a bass guitar that makes it sound like a bass guitar, string thickness, neck length, pickups, finger tone on the strings from the depth of the frets etc.. loads of stuff... so why would pitch shifting a guitar ever sound like a bass?
never tried it tho, never thought it was a logical idea...
and listening to that clip has made all this obvious.
even if u cant afford to buy one, get yourself a cheap one from argos or something, make sure its setup fine, get fresh strings and off you go
will sound better than a pitch shifted guitar
unless anyone can proove otherwise
Jim