Am I an able candidate for canine substitution?

hello, I have two congenitally missing lateral incisors and have already received orthodontic treatment and have since been fitted with two bridges. however, due to the unnatural look of the bridge I had hoped I could recieved dental implants yet my dentist has informed me I do not have enough space (left gap 5mm, right gap 4mm) I'm very unhappy with the appearance of my smile and I am now considering opting for canine substitution. would this be a viable option? if so how long would it take?