Yes, the single-sided copies 100% exist.
As I recall, it was ZTSC stamped, not scratched and the blank side had a plain white label and an audio tone.
Sorry no scan, as I decided to stick with my double-sided copy and didn't go for the single-sided one I was inspecting. Besides, the guy wanted too much (at the time!) for it.
Of course, the question now is which press was used as the radio promo and which one was used for the phone-in competition give-away copies?!
Naturally, this post is made with advance apologies to the Ric-Tic label collectors out there, who didn't know that there were two 109X presses, and therefore now have another label variant that they have to track down in order to complete the run!