Paint Disaster! Part Numbers?

[mwest29]

Hi all,

I've had a disaster in the back of my X5. A cracked paint tub leaked 10 litres (yes 10!) of cream emulsion paint all over the trunk area. Luckily I had the rubber mat in there and i caught most of it. After 3 hours of cleaning it's not as bad as i thought, but i simply can't get it off some of the plastic trims. Its gone into the pores of the plastic, thats the best i can describe it. Any ideas?

I was thinking of just ordering the plastic trims I need as spares and fitting them, like the two folding trunk sills. Where would I find the part numbers?

In my hour of need, thanks in advance folks!