I replaced the alternator in a 2005 RSX-S recently, using remanufactured Denso 2104168 from Rock Auto. This is suposedly for the base model but it did physically fit.
The control connector was in a slightly different place but it worked ok.
Their site says is fits these.
ACURA RSX 2002-2006
HONDA CR-V 2002-2006
They specify DENSO 2100507 for the type-S but I evidently missed that on ordering.