Couldn't find any one mention this any where, but Showcase Miniatures offers several styles of wig wag signals in HO -https://www.showcaseminiatures.net/ho_scale/ho_scale_signals_wigwags_trackside_details/ Only one style in N scale - https://www.showcaseminiatures.net/n_scale/n_scale_century_foundry_signals/ They also offer some neat other stuff as well. Bob
I have an American Limited #5400 kit for a pair of operating HO wig-wags. They will be used at Marquette Cement on my layout. Unfortunately, they are no longer available. Check out these videos: