scaniaman

as you may have read my last post a couple of weeks ago, i have today had my engine fault codes diagnosed & it comes up as throttle position sensor & knock sensor are knackered, so, firstly, does anyone know where the best & cheapest place are to get them from? secondly, mine is a 95 2000 uk turbo, so is it only the uk turbo 1 thatll fit, or will a wrx/sti from same year fit its an ej20 engine & lastly, where is the knock sensor on my engine? i know where the throttle 1 is but not the knock sensor, dont know where to look. any help would be great thank you