We are slightly bigger than $1b and do not have this capability right now. I have looked and see the same products as you. Most commercial products are in the $50k -$60k range plus a yearly maintenance fee. You might look at SNARE. It has some open source bits and pieces that may get you working. It also has a commercial version. The open source doesn't work for a company our size so we looked into the commercial version, but sadly it is around $20k plus a yearly maintenance fee. Keep me posted if you find anything else.