Not positive but Fine Tuning in Seattle may do ecu flashes. PM Chris (Sticky Tape).
According the their website they're an authorized Unitronic dealer.
I'm looking for somewhere in the Seattle/Eastside area that does ECU tunes for a MK.V 2.5. I know that Achtun!ing in Redmond does APR tunes, but I've heard that their 2.5 tune isn't great.
If someone has gotten their I5 chipped, feedback would be awesome. Don't want to pull/ship the ECU.
Make sure you spend a TON of time researching which tunes are the best for your car exactly, some have good tunes for some models and sh*t tunes for others. Find the best tune for your car, THEN find a place that sells that setup. Chip tunes are literally a shot in the dark 90% of the time so before you spend the money, find one that is really good!
Edit: OR at least find one that will allow you to tweak the tune without paying a ton per flash