here, i found one in WT, 10min walk from the train station Waldshut-Tiegen (SBB S27 from Baden):
Atelier 27
Schneiderei
Rheinstr. 27
79761 Waldshut
07751-802805
Aenderungsschneiderei
Massenfertigung
Eigene Entwuerde
Verkauf
Seide u. Cashmere
Boss is a chinese german, friendly and does great work, fast too. worth the consideration if it fits your location and shopping habits, you decide. Prices: