I am currently on the look out for a Ford Focus Zetec S with the upgraded alloy weels, privacy glass and satnav. I am also after the 2.0 engine. This combination seems to be difficult to find within my price range. Infact impossible at the moment. I can only seem to find the upgraded models without the 2.0 engine. However I have found a 2.0 standard Zetec S and was wondering how difficult it would to get the 18inch ones on there. I'm not too fussed about any particular alloy haven't shopped around yet as would prefer to purchase car with alloys already on. I would want to offset the cost by selling the standard 17inch alloys. How would I go about this and likely cost? Very inexperienced with this sort of thing.

Many thanks