Where to source a replacement Wifi Card for A1354?

Good morning!

Thanks for the excellent disassembly guide- very useful to see how these devices tear down before digging in.

One question though- where could I find a replacement wifi card for the Airport Extreme 4th Gen? Mine is working great on the LAN ports, but Wifi has failed- thinking it's a bad card and wanted to try a replacement

Thanks in advance for your assistance

Jeff

Update (09/16/2015)

Just saw the thread where this question has already been asked. I"ll try Google and Apple

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