Aftermarket or reupholster seats

I went the late model factory seat from a salvage yard. I had just recovered some 66 dart bucket seats and they were nice as all getout but sooooo uncomfortable on longer trips. so I put in 2003 sebring seats (nice heated leather ones on my hardtop that was a daily driver for 6 years) and 97 sebring cloth ones in the convertible. they are pretty comfortable and they were cheap. I paid 100.00 for the front AND rear for my convertible and 100 for the front leather for my hardtop. I was looking at some late model BMW seats that had all the added bolsters for tourimg driving but the were ripped up pretty bad. next car might get those seats if I can find a good set or some Audi's.

Do any of these seats bolt in pretty easily or need to be modded?