Pat!
Always buy the cap and rotor as a pair from the same supplier (e.g. if you are to get the cap+rotor kit from ________ Tire then yes, please do so).
What I'm trying to say is that don't get an aftermarket cap (non OE ones) and then get an OE rotor to go with it, chances are, it may not work at all.
reason being is that many aftermarket cap and rotor makers alter their design quite a bit RE: rotor contact surfact height, rotor spinning disc diameter, etc. dramatically from the factory specifications and they will make certain adjustments on the cap side to accommodate this (happened to me already with Neihoff and GP Sorensen aftermarket replacements for Honda cars).
If you get a cap and rotor kit from ________ tires (Neihoff), please get the full set. similarly, if you decided to go with factory units, get both cap and rotor straight from Honda.
(Also: don't hesitate to ask for a discount from dealership parts dept for many times they would give you 10% off or maybe a bit more)
Honda part#30102-P54-006 (Honda cap by Tec)
From my memory, this is a "universal" cap for all Hondas in the 90s but do double-check with your dealership if possible to ensure that.
Good luck.