Have you tried to contact Evelo directly to get a list of LBS that they have used in the past to implement Evelo Warranty work?
As you probably already know, when there is an Evelo covered warranty issue, you as the owner simply contacts Evelo, they work & schedule the warranty repairs with...
If you are/live in the Seattle area, then the Evelo Showroom is right in Downtown Seattle. Evelo used to keep most current models in their showroom, even when the supply of those models were on backorder.
You might try reading the Evelo forum here on this site since I believe that Evelo uses various models of the Dapu mid drive motors on their bike lines and reviews are mostly positive...