O2 sensor

Hi All.

with a bit of assistance it looks like the fault on my 97 Jap STI is the O2 sensor, anyone got some idea's were i can get one, the numbers on the unit fitted at the moment are as follows, A24, A71028, 7Y200, not sure which of the numbers is a Part number?

any idea's and she has 3 wires going to the plug.

thanks in advance

here you go

http://www.justlambda.co.uk/

THANKS FOR THAT, EMAIL SENT WITH THE NUMBERS, COULDN'T FIND ANY CROSS REF ON THEIR SITE.

Any of the motor factors in Ennis will have one Paul. Just ask for a 3 wire lambda sensor-bout 90 quid. Ill help you with it if you need me. Sean.