Okay so I found out Serramonte Acura (ask for Victor), is also able to offer a discount for NSX owners for those in the north bay / peninsula.
One of the parts counter guys, Victor, is apparently a former tech at Hilltop and is also quite an enthusiast. I went in to order some Integra parts also while I was in there and he was able to give a discount for NSX owners. They can't offer the same pricing as Tim Proliniak (not to mention having to pay tax) but it's nice to be able to pick up a part locally in a pinch have it in next day if it's not in stock. He was also nice enough to let me compare spool valve gaskets between a 91 and a 96 to see how they were different when I ordered the wrong parts online.