OK what are the options to get rid of PS and AC

i'm in the process of a swap - putting a K20A and Box into a mid engined car
the car has no power steering - or air con
so i'm keen to ditch the PS pump and AC pump - but obviously keep the alternator
seem to be 2 ways around it

1, use the Civic EP3 idler pulley and belt
pros = should be stock parts - easy to tension - and its tried and tested
cons = so far i've yet to track down the idler in the UK

2, use an overside alternator pulley and custom belt
(thought i saw photos on here)
Pros = Very neat - no unecessary moving parts- less space
Cons = may need a custom belt - not clear how to tension

any thoughts, experience or specifics would be great

i'm sure i'm not the only one that would like to know (great Forum!)