wa 'alykum asalam warahmatulahi wabarakatuh.
jazak Allah khayr. theres a masjid in vasteras:
they even have a email address, so you could mail them and they could help insha Allah. the only problem is - most masjids arent organised these days so they might not reply.. but it does have a slight description where it says
'Name of area is oxbacken, near the pharmacy'
Vasteras islamiska center
Vasteras, Sweden 724 00, SWEDEN
and a phone no.: 46 21 13 21 45 +
(i dont know why the plus sign is at the end. maybe the swedish telephone system is different, or maybe there is no need for a + sign, i'm not too sure sorry.)
keep in mind that vasteras is a big city (from what i've read) so it might be hard for the sisters to find it.. insha Allah we should pray for them. if you need any more info. please do ask. jazak Allah khayr.
wasalam o 'alykum warahmatulahi wabarakatuh.