The only thing you can do is try Cisco Remanufacturing to see if they have any 6148 AF or 6548 AF cards if you are trying to fill a few slots or as a stop gap. The don't have any 6148 AT cards left. The both have gone EoS so you will only get 4 years worth of support for them (same as if you bought original before they went EoS). Don't be in a hurry as it may take as long as 30 days for them to re-certify a card that they have in stock but is considered "unfinished". You can also buy the 6800 Instant Access switches (think Nexus 2K/FEX but for the campus) but it doesn't help if you have a bunch of empty slots in a 6500 and you wanted to fill them with PoE.
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