Hi Emma ,
First thing Rocstas had 2 style of seats the DX modals have the cloth
interior and the standard has more of a plastic/cloth interior ,
I fitted bucket style seats from a suzuki sj to my LEZ rocsta will
load pictures , "you swap sides when fitting" as for the rear seats
have not found anything else but the rear seats are good as they are
for folding up behind the front seats , was in a scrappy and noticed
an old Merc 4x4 and it's 6th & 7th seats looked like they would bolt
on sideways into Rocsta but only on hardtop modals as no rollbar to
get in way ,
yours Callum