EBC make floating front discs for the K100 but I'm not sure if they do a wave rotor. I have a rear disc from them and it is a far better brake than the OEM stainless.
AMEN, I R&R Pete's K 75 with EBC semi floaters, quite impressive over the BMW OEM stock rotors.
You are correct the EBC's are NOT a wave design, NO BIG deal, wave design is purely cosmetic in function.
FWIW, the pulse may clear up if you practice hard braking. Changing to a different brand of pads is another suggestion.
FunKy front wheel bearings can also mimic a pulse.
I happen to have a spare pair of stock front ABS rotors in my parts stash. Take off from a rear ended K 100, like new condition. Tempt me with a reasonable offer.