Borrow request (Chicago): Cat 4900M copper interface(s)

Hello all,

I'll spare you the details, but we are in need of some
means to temporarily get a copper interface on at least one of our 4900M
switches to narrow down a network performance issue.

Does anyone have
a 4900M half card with copper ports, or a Cisco TwinGig X2 adapter in
the Chicago area? We would love to borrow one or two for a few days
until we can locate and resolve this issue.