Question about Westin Bed extender

Hello everyone!

WescoTaco08 here. My first post on tacoma world, so bare with me.
My weapon of choice is 08 Tacoma Trd Sport D-Cab 5ft. bed SR5 Pre-Runner in white. Adds: Westin Ultimate bull bar w/ westin driving lights, westin step bars, bully hitch step, and an Undercover tonneau cover.

Looking to purchase a westin bed extender. First question is what model# should I be looking for? and second, will the Undercover tonneau cover plate used to lock the tonneau cover get in the way of the bed extender folding in-n-out?

Thanks for your time and your input will greatly be appreciated,
Carl