Here is the source I’m looking at using for my Sport Fury. Cool thing is they will send you a free sample to best match your top.
Chrysler Imperial (including Crown & LeBaron) - 1969 thru 1973 - Landau Vinyl Tops | TopsOnline
All the controls work, the vacuum motors move the doors properly and the blower motor works in all speeds. I still have to test the heater core and evaporator, hook up the heater hoses and ac lines.
Instead of doing the bypass I think the best thing you can do is eliminate all that amperage from passing thru that amp gauge circuit. Anything that pulls a lot of amps try to find a different power supply closer the battery main power. The alternator can go directly to the battery instead of...
I have not bought one but have researched them. I plan on using one for my fury. The thumb wheels don’t turn all the way around like the originals. They rotate up and down just a bit. So they are functional but not like the original.