Configure Bluebox calls to go thru Elastix

I have a bluebox vps and an elastix vps. Elastix has trunks to reach to the outside world as well as receiving incoming calls from the outside world. Elastix is also configured with a2billing billing system to auto calculate minute usage and other billing related things. Because a2billing doesn’t work on freeswitch, I had to use Elastix, but Elastix doesn’t support multi-tenant, so I created another vps and I installed bluebox on it. I would like bluebox to use Elastix as a trunk to reach the outside world. In other words: Bluebox ==> Elastix ==? Outside world…….. as well as……… Outside world ==> Elastix ==> Bluebox Again the main reason for my above requirement, is because I need a billing system for bluebox, and I want to use a2billing, so I want to route all calls from bluebox to go to elastix which then goes outside. Another requirement, I’m really not sure if this is possible or not, but I thought I would ask you since you would be able to do the above: Since I have Elastix vps and Bluebox vps on the same physical hardware, I’m using SolusVM on the physical server, and both Elastix vps and Bluebox vps are created with OpenVZ. I want to see if it’s possible to let them talk to each other without having to go outside of the physical server so I don’t waste bandwidth when I don’t have to. But if this is not possible, then don’t worry about it. Please let me know about all of the above cost and turnaround time, It's a bit urgen to get this going. i will need you to make a document with the full steps taken to accomplish the above, because we're doing a lot of testing on this system, so we might need to reinstall elastix and bluebox at any point, in this case we would have the steps provided by you to follow to accomplish all of the above. i will go by the deadline agreed 100%. any outrageous bids will be ignored, we contacted the company who created bluebox (2600hz) and we already got a quote from them to do the work, but we're confident that someone here might be able to do it for cheaper. if you don't have experience in bluebox, freeswitch, and elastix, then please don't bother bidding, i only want people who have real experties with this. no payment will be released before project completion until after we test everything OK.