The fact is there's lots of seats that can be made to fit. The big problem is that there are very few that have the low seat base of the standard defender, or defender specific seats.
While this may not be a big problem for short - average height drivers, for guys that are 6' plus like myself it becomes a problem.
I really like the Defender XS Premium seats but don't have the funds to stretch to that. Right now I'm looking at seats from smart car, RX8 or Discovery1.
I'm erring towards RX8 cloth seats right now. I'd like to keep them LR but it looks as though the Discovery bases look to be twice as thick as the Defender ones..