Bowed legs just below the knee, would calf implants help this?

You are definitely on the right track, placing calf implants into the inner calf muscles could indeed help reduce or significantly eliminate the visible "bowed" effect of your legs. However, please keep in mind that an in-person consultation with physical exam is first necessary before any legitimate evaluation or final surgical recommendations are made. Very few plastic surgeons specialize in this operation so you may have to travel a long distance to one that does. The implants are made of soft semi-solid silicone rubber and placed surgically through a small (3/4 inch) incision in a natural crease behind the knee. When the implants are properly sized and placed under the muscle fascia, they should blend in and look natural. There are too many critical nerves and blood vessels under the muscle to risk putting the implants under the actual muscle bellies. 
All surgery comes with post-operative pain and recovery.  For calf implants, the first two weeks after surgery is the most difficult time because walking is painful. However most patients ambulate just fine without crutches, some choose to use them for the first 3-5 days. Recovery usually progresses at a smooth steady pace after the initial two weeks. Patients can fly back home as soon as 4-5 days post-op. Driving a car is usually allowed after 7-10 days. Low intensity seated upper body workouts can resume at 2-3 weeks, standing at 4 weeks but no legs for 6 weeks...remember, you only have one chance to heal properly. Glad to help. 

Calf augmentation with slinicone implants is the best choice for you.It will improve the appearance of your bow legs after the surgery and you will see the immediate result after your operation.Calf augmentation with silicone implants is a safe surgery that give excellent results in selected cases

Calf implants on the inner or medial side of the legs can be beneficial to create the appearance of straighter legs. I would have to see pictures of your legs and do some computer imaging to see if such a change would be of aesthetic benefit.