There are around 420 Hofer shops in Austria, so you'll have no problems.
Just go to
www.hofer.at >> Filialstandorte and type your place.
Unlocking your beloved Huawei surely is one way, but the Hofer Yesss! offer:
(see
www.yesss.at)
Huawei E1552 Komplett-Paket
yesss! Internet Daten-SIM-Karte + inkl. 2 GB GRATIS Datenvolumen + entsperrtes Huawei E1552 USB-Modem + gratis yesssica!
EUR 54,99
includes free unlocked (=entsperrtes) modem, SIM and 2GB (valid for 1 year after activation) for €54,99.
512MB on a single SIM are already €9,99, so think about spending time, hassle and money for postage and unlocking.
Unlocking should also be possible here: www.online-unlock.com