1954-55 windshield wiper kit?

[Flysocal]

Looking for a 12 volt wiper kit. Right now I have nothing. No hole in the firewall (smoothed) no brackets, no control arms, nothing. So looking for a complete kit. Something that will be hidden under the dash and use stock wiper switch hole. I've been looking at several kits such as Newport engineering (doesn't include everything). Classic industries has the complete kit for $500 but don't want to drop that much coin if I don't need to. Suggestions please! I'm a bit confused as I never saw how the original setup perturded into the firewall/engine compartment. So when all the manufacturers state it bolts into original location I don't know if it's visible in the engine compartment or not.