Upholstery Wild Hair Adive Needed

[sick472]

Yes, another wild hair. I posted this over in the 88' to 99' section, but no response. Has anyone redone a set like below?

I have a 60/40 truck seat that I will be using in my 72 like the pic shows (not my actual seats). My seats are in decent shape, BUT I have always dreamt of having denim seats and I think I can sew my own out of 20 years of saved up old blue jeans. I was thinking about removing all the existing coverings and using them as a pattern to develop my denim set. Is it that straight forward or are these newer seats all formed and glued together? I would hate to try to remove a good set of covers to find out that I am over my head and possibly ruin the upholstery. I have recovered three sets of late 60's seats and they are what I am used to...

Are the newer seats similar when it comes to taking them apart?