This product is either discontinued or we cannot get that from suppliers.
Lenovo Broadcom 00D2028, Network Adapter, 10GbE SFP+, Plug-In Card (Mezzanine), 10 Gigabit Ethernet, Host PCI Express 2.0 x8, Network 10GBase-X, Connectivity Wired.
Lenovo offers the Broadcom 10 GbE SFP+ network adapter family that is based on the Broadcom BCM57811S and BCM57810S controllers for System x servers.