I am in touch with http://www.accellion.com/ and checking at the Kite works enterprise. The parent company is using a product from this, but with limited storage space, but since they already use a product from accellion, I believe getting this approved would be much easier than introducing anything new. Got in touch with the local distributer and they agreed to give us a 15 days demo so we can test this in realtime. Its a software appliance which works with vmware/hyperv. Will share more details after the demo