Do you think my sons need an older male role model?

Definately if there is no father at home to spend time with them and model that role. Good male role models can be found in the Cub and Boy Scouts, the Civil Air Patrol cadet program, the Big Brothers, little league and soccer teams, and most church youth programs. They have all upgraded their Child Protection Policies in recent years, and all official volunteers have undergone certain background checks. But be super diligent and do your own checks and get comfortable with these men before you let your kids out of your sight. PM me if you need more info.