Here are a few more that I don't think you have:
KBPS 1450 AM, Portland, OR (second station in this market; affiliated with Benson High School)
KMEE, 103.1 FM, Palm Desert, CA
KWAV, 96.9 FM, Monterey, CA
WKEZ, 1240 AM, Bluefield, WV (this one has a satellite station but I can't think of its callsign right now)
WWII, 95.9 FM, Pillager, MN (This one is normally country)
WDEA, 1370 AM Ellsworth, ME
WSTY 89.3 FM, Milledgeville, GA (it looks like the stream is fixed on this one)
WINN 103.9 FM, Columbus, IN (the second station in that small market)
I don't know when these stations began playing holiday music though I suspect it was rather recently in most cases.