You could try the Tennis and Golf shop at the top end of ID and on the 192, but like Deb said, Edwin Watts is the best!
Again, we agree the one on Sand Lake Road is the best. Look out for the golf ball deals- (loose ones)... I think ProV1's were $19.99 per dozen!
I think the best thing about Edwin Watts is the choice, so much more than you get here!
Tracy