I don't remember Frontier Lawyer, but Frontier Circus had two spanking scenes in one episode. I have a copy of the episode and believe that it is on one of the Cinema Swats video's. I always remembered the spankings in Frontier Circus, because I liked the sound effects,the smacks wee solid sounding.
I particularly liked the allusions in the Bat Masterson spanking scene, it is almost as good as the the allusions in the Temple Houston Guardian episode.
My guess is that almost every sit com and western of that era had a spanking scene at least once.
The spanking I'd like to see again from those days is "Petticoat Stage" from the Wells Fargo Series.
Still another from the 50's that is very good and can be seen on the Western Channel from time to time is the OTK spanking Gene Autry gave Gail Davis in the Vengence Valley episode. The Western Channel version has the complete spanking. Gail Davis also got spanked by the Cisco Kid.