There are 194 LED bulbs that are polarity independent, meaning they work with either polarity.
These are the ones I got for my 1970 rewire project:
https://www.superbrightleds.com/more...t-car/197/850/
They have them in various colors, including red and yellow for the side markers, for the 194 socket.
I have verified on my bench that they work with either polarity.
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1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights