Okay -- I got some more for you:

IRS's "Just In Time for Christmas" compilation from 1990. Features some original stuff and some traditional covers by various IRS acts.

Also, Nerf Herder's "Hi-Voltage Christmas Rock" EP, which features such classics as "Santa Has a Mullet" and "I've Got a Boner for Christmas."

You might also want to check out "Christmas Party With Eddie G."
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Bitt Faulk