Hi mate welcome to the forum
I bought my ZS 180 hatch in 2002 brand new, it came with large rear spoiler and chrome kick plates as standard. I got an electric sunroof and rear headrests added as an option. It doesn't have the door inserts like some of the earlier models though. Try an MG/Rover dismantler for the kick plates and if you wanted to spend some cash they might have door cards with the inserts.
I've bought spares for previous Rovers and for my current MG via the 2 websites below and never had any issues...
www.partsgateway.com
www.1stchoice.com