The website Tanssikengät.com lists all dance shoe shops in Finland. The site is in Finnish and you can search shoe shops by city in “Paikkakunnat”. El Ático in Helsinki and La Fábrica del Tango in Tampere have dance shoes on display, El Ático from Tango Room (Tangolera, Nueva Epoca, Turquoise, Werner Kern) and La Fábrica from Pasi y Maria Tango (Tangolera, Madame/Monsieur Pivot) and TangoPiantao (DNI Tango Shoes).
La Fábrica del Tango in Tampere has a display of tango clothes by TangoPiantao (Tanguero Men’s Trousers and Handmade by Carina Quiroga) and Pasi y Maria Tango (Roxana Vincelli Ropa para Bailar, Linea Maria by The Evil Dressmaker). My LENTO makes unique tango clothing for women in Turku and Fru Tangowear (link coming soon) in Helsinki.