Sorry for no reply
All jokes aside, Sometimes I get no response to my questions either, depending on when I posted. The weekends tend to be hit or miss because the guys in the know may not be looking at the site enough. Also the way the site is structured, if there are a lot of responses, ones question may get pushed down the page and be missed.
Please dont take it personally, we like all people and things aviaiton.
Lastly, I think most homebuilders do there own avionics to save costs. And those who dont, probably cant afford to live in So Cal anyway. I say this in jest, but I have found professional recommendations on this site for socal are not very frequent, for whatever reason.
Now if you ask about a building question, the experts on this site are wonderfully helpful.