I whatsapped with TeslaOffer - great, fast responses by the way, as long as one is aware of time zones - and their contact doesn’t do equipment installations of any kind any more - just a paint and wraps sort of shop now.Maybe send an email to Tesla Offer. The show Seattle in their dealer network, but it doesn't specify who.
I believe car toys may do custom installs paying by the hour, but they have not replied with a quote yet. Accutint Bellevue has referred me to benchmarkmotoring.com but haven’t reached out to them yet.