I made some enquiries today at MS Designs UK asking if they stock the kit and cost.
Here is their email back to me.
Thank you for your enquiry. Sorry but we do not stock this kit here, however, there should be available stock at MS Design, Austria.
MSDS020701V *- Front spoiler anthracite inc. insert in red or silver * *- £423.72
MSDS020701LR - Side skirts (pair) anthracite * * * * * * * *- £447.48
MSDS020701HD - Rear diffuser matt black * * * * * * * *- £298.76
MSDS020501DF - Roof spoiler glossy black * * * * * * * *- £362.34
MSTLS020502 -
Lowering springs * * * * * * * * * *- £242.44
MSDERA0801AZRO - Décor RACE 3-piece anthracite/red * * * *- **£96.80
FES02802455112/18 - Alloy Wheel MS18 8x20 * * * * * * * *- £458.40
MSDS021051TFL - Daytime running lights left/right with or without fog light provision matt black - £335.50
Seems a bit pricey to me and you have to add the VAT on top of that.