Hard bed cover for Gen 3 . PLOT TWIST : no bed rail system in my bed

I do not have the rail system on the sides. I do have the front/bulkhead one. Anyways, I am looking for a hard trifold , no rails needed, and can still use a bed extender.

I was going to order the OEM , but it states rails needed.

Yes , I know there is a bed cover forum , but not finding any answers.

 

I have the ultra flex that I bought from a vender here, it comes with the brackets to install without the rails. I took my rails out and mounted like this since it would don't sit right with the rails installed.

you can click on my build thread there are some pics in there of it

 

Will do, thanks!