How do i get someones phone number in Olsztyn?

Hi,

I've written to an ancestor (last remaining one from the WW2 times) quite awhile back, but he never replied.

My next option is to phone him. The is the only info i have....

Surname - KUPER.
Ostre Bardo
Poczta - Wodukajne
Woj. Olszynskie

Is anyone able to look in a phone book for me?
Or, should i try posting in another forum?

Any suggestions as to what i should do.

Thankyou,
Bobby.

Thankyou, someone has given me phone numbers.