Greetings,
I really like this kind of projects.
Look, there are few reasons to choose me :)
1) I have some experience with Cisco in the past - I passed CCIE SP Exam in 2010
2) I believe we will be able to figure out what's going on with your box and I can also assist you to interact with Cisco TAC if needed. To be realistic, I need to say, that while we're investigating the problem without involving of vendor, we're limited to the amount of bugs and details published for the external audience by Cisco.
So let's discuss the details and try to investigate it. You will only pay if you're satisfied with the outcome.