I need help with a photo

I got married in the Summer and somehow didn't manage to get a photo with my mum!! Is it at all possible to somehow merge a photo of the two of us from separate photos? I have provided a selection of photos to work from. I'd like to know if it's possible to come up with a decent end photo and how much it would cost. Thanks
I only seem to be able to attach 3 photos so I have added the only 3 I have of my mum. I can provide lots of ones of me at the wedding to work with.
Thanks, Sally