[husker boxster]

I was going to suggest it could be the AOS. There is a rubber seal around the bottom that was leaking on my LE.

Since you've replaced it, I agree with Gilles to clean your engine and see if it's still leaking. Put the top in service mode, pull the engine cover, and clean from the top of the engine as well as the bottom. Do not use high pressure as you can cause numerous bad issues if you do. Get a can of Gunk Engine Cleaner, spray it over the AOS base area and lightly wash off.

This will be a good starting point. If it works, easy fix. If not, you've checked off a couple of boxes - changed AOS and cleaned area.