Los hijos de la novia

I really liked all three movies - Children of the Bride, Baby of the Bride and Mother of the Bride. I am buying Baby of the Bride from Amazon.com but I don't know where to get the other two. Does anyone know where I can purchase them? Kristy McNichol is one of my favorite actresses and I try to purchase most of her movies. Children of the Bride is the one I am most trying to find. I really like Patrick Duffy and Children of the Bride is the only one he is in. I would prefer to buy these movies on DVD but I will take VHS if I can find them. All three movies are fun and cute especially if you like Rue and Kristy. If anyone knows of any other movies like this please let me know.