Not that I can find. IBM only support IBM adapters on pSeries / System P these days.
If the adapter is a genuine Adaptec adapter you will need to search for an Adaptec driver for AIX.
If you do find an Adaptec driver IBM will not support it on the adapter in a P system.
Given the lack of responce from the AIX fix site:
http://www-912.ibm.com/eserver/support/fixes/fcgui.jsp
(I tried 4.3, 5.1 and 5.2)
and google I think you wll not find what you are after from IBM.
Hint: if you want to search a particular site in google use a search argument like:
site:ibm.com key words
and you will only get results from domains that end in "ibm.com"