Alternatively, go to these guys. You can buy 1000mm strips at 50mm wide, which'd cover your sill nicely. You'll have to do a bit of trimming here and there but not very much. I bought 100mm wide to span the sill and out to the s/s side bars, to stop thoughtless passengers slowly scuffing up the sill and the side bar. If you do what I did, you'll have to shape the full length into a shallow "V" channel, or the door fouls on the checker-plate.
Cheers, Steve