double stroller search

So I have been trying to find a double stroller to use for my kids when I have my second one in September. So I have been looking and I cannot find one that will work with my car seat so I can have my baby sit in it. Does anyone have any suggestions. My car seat is cosco light n comfy car seat. We have the stroller that came with it but we have a one year old and he will need a seat and would make it easier for a double then two strollers.