My Tier 1 holster that I got for my Shield 1.0 3.1" (with TLR6) fits my Shield plus 4" with red dot (and TLR6) just fine.
The side car is a little snug for the mag even in the widest I can make it.
Currently looking for other holsters too.
Justholsterit.com
Seems to make custom set ups with...