For wheels/tires check out Carnutz (425-641-7000) in Bellevue, located in the same complex as Park Place LTD. Park Place sells pre-owned NSX's, Porsches, Ferraris, Lambos, etc. Ask for Zack - he has a widebody custom NSX showcar.
For detailing/window tinting/clear mask - Accutint in Bellevue...