I need a 1x PCI express network card

Can someone please point me to a 1x PCI express network card that works with Mikrotik?

I have an ASUS MB with onboard LAN but it doesn’t show up in the interface list.
The system resources show the card as MCP51 Ethernet Controller (rev: 161)

HELP!

Those new intel pci-e single / dual nics should work, if you can find anyone that sources them.

Sam

Should work or will work?