Long time lurker, seldom poster here...

I need to buy a new Kneeboard. Don helped me purchase my first - a Parkes - a several winters ago - and I picked up a shorter, thinner, summer time board from my friends down in Brazil a year later.
Now I'm ready for another one, but where to buy? I'm pretty lazy when it comes to understanding dimensions and design. Ideally, I'd like to buy one off the rack and just go surfing.
Where I surf: OB San Francisco up to 8ft.
Frequency: Weekend Warrior.
Me: I'm 5'7" 170lbs.
(Non)ability: I'm def not a ripper

Any suggestions? Do I need to order from overseas? Or can I find a shop/shaper here in California? Anybody want to sell me a used board?
Thanks in advance,

~SS7