Found Blurr and Dirge today at the Target on the Southeast end of Fort Collins, CO, the one on Harmony, but the sightings database doesn't have an entry for that store.
I bought both of them, and one each was all they had. There was also one of the ROTF Chromia repaints, for what it's worth, which I did not buy.
I still haven't found WFC Megatron, WFC Soundwave, Darkmount Red Alert, Tomahawk, Terradive, or the 2nd wave of PCC two packs.
Also haven't found Axer or Nurse Ratchet, but I haven't really been looking.