Genealogy / Tomasz, Maryla Wicha or Wiecha - Finding Relatives who lived in Krakow in the 70's [4]

Hi,
Can anyone help me?
Am desperately trying to find long lost relatives who used to live in krakow in the late 70's.
Their names are Tomasz Wicha or Wiecha, and Maryla Wicha or Wiecha.
I guess Tomasz will be about 45 years old now.
Would be appreciated if anyone can tell me how i could try and find them.