Disco 1 Seat retrim kits

Just purchased myself a 98 Discovery 1 V8i ES and while it all looks in very good condition the drivers seat is a bit grubby. Looks like one of the previous owners as been dropping something nasty into his lap.

I've been looking about the Landy online stores and Ebay but I can't find any re-trim kits for the seats. Exmoor trim do do re-trim kits but only for the early grab handle style seats. I checked the Discovery 2 listings and they do the seat base foam but no covers.

It's not a major worry as I can get some cheap nylon seat covers but I would like to fit some nice clean covers at some point in the future, especially when I come to sell her on. Does anyone do seat re-trim kits for late Discovery 1 seats???

There are a lot of Discos being broken, might be worth checking out a few first. I took out the rear seats of my old farm workhorse and the covers seem to be easy to remove, I wonder would the bases of the front seats be interchangeable left to right? Someone more knowledgeable on here might comment on that.