integrate opencart with ariba

Hello.
I client of me ask me to offer him a,solution of online catalog or store that could communicate with the ariba system.
Very big Companies has the ariba system to make theirs buying orders, so any order must be be read by opencart.
I was googling and can't find anything that connect opencart with ariba
If someone could help me, even making some charge to have the solution, I will be grateful