Hey Michael! My name's Scott, and I'm also in Lodi! I've been building a Waiex (#0076) for several years. Can't help you with finding dual time - the only Sonex owner I knew, based at 1o3, moved to Colorado or Wyoming a couple of years ago.
Have you tried looking at the Sonex
builder's site? There are a number of in-progress project listed for this general area, and I would imagine some of those folks may have completed their planes (some are terribly out-of-date), or know somebody who has. Keep in mind, Sonex's and Waiex's are rumored to behave virtually identically in flight, so you needn't limit yourself to the y-tails only.
If you ever want to get together, or take a tour of one "in progress", p.m. me! I'd *love* to get a close-up look at a finished one!