Yes...Another Fresh air question!

[Linus Hong]

Hey all,
Well... (sigh) I must ask this question...  I bought a
94 se-r with a broken fresh air switch. (It was
snapped).  Not a surpriseto me since I've heard about
this before.  Let me get to the point.  I've searched
the archives.  I just want to know whether I have to
get this done at the dealership or can I do it myself?
 How much does the dealer charge for this?  If I do it
myself, is it a PITA and what parts do i need other
than the actual lever?  Part numbers???  PLEASE HELP!

TIA

Linus