Tonneau covers

["Dr L. Kevin McNelis" <kmcnelis@nmsu.edu>]

Does anyone make tonneau covers that either have ports that roll bar 
legs will go though, or a tonneau cover with packets like those for 
headrests and the steering wheel?

Has anyone ever modified one themselves to fit? I am seriously 
considering cutting ports to fit around the legs, seaming them, and 
putting snaps at each corner.  It is a LOT easier to sketch on paper 
than describe!  If any of you have done it, do you have a patern?  Or 
suggestions?

Thanks as always, Kevin