anyone know which idler pulley GBS use on there alternater kit?

I think it is this one!

FORD MONDEO 2.0 2.2 DIESEL TDCI TENSIONER IDLER RIBBED PULLEY | eBay

got one of those, it needs fitting with a tapered bush !!!!
need one that just a straight 8mm or 10mm bore

Have a search for the idler pulley from the Ford 1.8 diesel, I have two of those fitted in my boat and pretty sure that they are straight fittings. HTH Ray

Edit to add, just had a punt though Ebay but no luck, might try a main dealer!

[Edited on 17-9-12 by Chippy]