Funny thing, similar thing is also available from TekLager.se. The one with C3558R: TLSense C3558R: 2x 10Gbps SFP+, 7x 2.5Gbps LAN, Atom C3558R CPU, and there used to be one with C3758, and I have the latter version.
Something to keep in mind, is that it seems the SFP+ ports might have some uh...