Oil cooler?

Hi guys.
The Hobbs on my Zodie HD clicked past the 20 mark this morning. I'm half
way to the magic number 40 when I can finally get outta this 50 mile
circle. All's going well, except the Jabiru 3300's CHT and oil temps
are still hotter than I want to see. At 2750- 2900 RPM's my hottest
cylinder runs about 335 degrees and the oil temp is about 230 degrees.
Lower RPM's yield CHT's 0f 250-300 and oil temps of 180.
I'd like to go to a larger oil cooler, the one that's in it is pretty
puny. I called the local Jabiru dealer in Fresno and he emailed me a pic
of his installation: http://www.lightflyers.com/oilcooler.jpg , a much
heftier multi-core setup.
I know a lot of you guys have gone down this road before, so I'm asking
for suggestions on what and where to pick up the right oil cooler. I'm
gonna hit a couple of the local race car suppliers tomorrow and see what
they have, but if any of you have already done the research and have any
thoughts, I'm all ears... errr, eyes.

Thanks,
Rick Pitcher