Can anyone suggest a 3rd party company that allows you to integrate an album / gallery page you can print from into Squarespace?

I'm a wedding photographer and would like my clients to be able to order prints directly from the gallery page / online album I send to them. However, you cannot order prints from the s.space albums, so I'm looking for a 3rd party company that provide software that you can integrate into the s.space website. Eg. Shootproof offer online digital albums that you can print from but don't think can integrate into s.space website and I don't want to be leading clients away from my website.

Look forward to any thoughts,

Thanks

Mark