Bed mat for truck with drop in bedliner

Does anyone make a bed mat that will work on a 21 short bed with drop in bedliner?

 

I thought getting a bedliner myself after getting the factory Toyota bed mat. However, it seems like most people end up taking out their bed mat because of the rain/moisture over time that builds up under the bedliner and causes the bed to RUST. So...people end up just getting their beds Line-X and then putting a bed mat on top.

 

I kinda agree.
Ditch (or sell) the drop-in bed liner.
I'd go with a Bedrug bed and tailgate mat whether you get a spray-in liner or not.
It mounts with Velcro (even to a sprayed bed) and easily comes out if you need to haul something dirty.

 

My 2010 SR5 is lined with a spray-on liner and I also have a 1/4" rubber bed mat in it. One lesson I learned(the hard way,like all of 'em) is the tailgate mat blew out my lift support strut be cause of the extra weight. I replaced the mat with the Bedrug for the tailgate.

 

Not interested in the other options at the moment. Just looking for a mat to go on top of the plastic drop in. Thanks