Besides the online store, these stores from stones are selling cards:
 
Ine miene mutte: Broechemsesteenweg 23, 2531 Vremde, Belgium, openingsuren

Via Libra: Gitschotelei 188, 2140 Borgerhout, Belgium, openingsuren

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Kaap De Goede Hoop (temporarily closed): Tabernakelstraat 2, 2140 Borgerhout, Belgium, openingsuren

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