Not to be confused with Antenne Vorarlberg, Radio Vorarlberg is the regional station of the ORF, the national public broadcaster of Austria. I heard Radio Vorarlberg while staying in Altenstadt near Ulm (Germany). 98.2 MHz is the main transmitter with 50 kW from Bregenz. Other frequencies (with the exception of the 4 kW transmitter at Bludenz) are mostly relays with less than 100 Watts of power.
There is a webform on the site to contact the Vorarlberg station as well as other regional stations. But as I wanted to include a picture I sent my report to kundendienst(at)orf.at which got forwarded to the Vorarlberg team. From them I learned you could als use this address: publikum.vorarlberg(at)orf.at