I've checked the latest Scapy sources and there isn't any 802.1AD support, yet I have seen Scapy scripts referencing Dot1AD.
For the record, 802.1ad support was imported into Scapy master on July 30, 2016. So you don't need to get scapy-com (no longer maintained) and can use the "regular" Scapy. The associated layer is Dot1AD()
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