I searched the Sask. 411 phone directory with no results for Sopinkas. I did get some interesting results by searching
https://www.familysearch.org/ I just searched using Sopinka and check marked "Match all terms exact" It shows 38 records. There are some Sask. Sopinkas shown as being from Bohemia. You also might try using Sopinko as records show up under that spelling and mispelling is common. Butch