there are two quite good model shops in Bratislava,both are in Petrzalka district. Here are they adresses:
Plastic hobby kits-Manesovo namestie(square)8,Bratislava http://www.phk.sk/
Bornit,Starhradska 6,Bratislava http://www.bornit.sk/
There are two modelshops in shopping centres-one in Aupark centre and one in Avion shopping park-but the sortiment is together with funcion models.
The best slovak modelshop is in Malacky town,which is aprox. 30 km from Bratislava. http://modelshop.sk/index_main.php?parent=1&id=1&page=navi
I hope I helped you.
My best regards. Martin