Bitcoin Mining Pool

We currently have a website for mining multiple Cryptocoins. We would like to add Bitcoin to the site, however we do not have enough hashing power on the site to find a block in a reasonable amount of time. We would like to find someone that can build or find software that will allow the pool to connect to another larger pool (for instance Elijius), then track and distribute our earnings to hashers on our site. The coin front end is currently using MPOS and we would like to keep that, but if not possible we can discuss an alternative.