Just doing some more digging on this, and went over to Chevron's website and looked at their DELO 400 line.
For dino 10W-30 (and 10-50 straight grades), they have the following product data sheet: PDS for Chevron DELO 4000 10-30 7 10-50 straight weights.
I also found a synthetic (no idea if that's group 3, or really real group 4 and/or 5 synthetic...my guess it's group 3) 0W-30, which would be ideal IMHO, and it's PDS (along with the synthetic 5W-40) is here: PDS for synthetic DELO 400 0W-30 and 5W-40.
It looks, according to these two links, that neither of the xxW-30 DELO 400's are CI-4+ rated, however - interestingly - the dino 10W-30 is CI-4 rated, where the synthetic 0W-30 is only CG-4 rated? I thought that was strange, but that's what their own PDS says...
It looks like so far, looking at the Chevron alternatives, I'd be going with the dino 10W-30 DELO 400...it's even closer to the viscosity range I was looking at...the synthetic 0W-30 is very thin, 10.3 cSt at 100 C, whereas the dino 10W-30 is 11.1 cSt at 100C.
I'll do some more searching in the days to come...
Chuck