you would be looking at $135 per sill (1200mm long) and $135 for shipping for two of them
thats in NZD, so depending on the exchange rate it would be within the realms of affordability

http://www.trademe.co.nz/motors/car-...1391699262.htm

i have not seen the sills this guy makes, but people in my car club have used them for some other vehicles and were happy with them

he also does first gen ones
http://www.trademe.co.nz/motors/car-...1391699825.htm