You might try to contact the tourist office to see if they have any suggestions:
Klosters Tourismus
Alte Bahnhofstrasse 6
CH-7250 Klosters
Tel. +41 (0)81 410 20 20
Fax +41 (0)81 410 20 10
eMail
info@klosters.ch
On their site clicking on the email address takes you to a
form which may be their preferred form of electronic communication.