I have more trouble with fogged up windshields on the inside during heavy rains. Do they make wipers for the inside?

Not to hijack, (OK it is a hijack

), but does anyone know if theres an aftermarket source for those window vents that'll fit our AD's pre-side vent windows?
They have them for the AD's with the side vents..
To get back on track, if I know it's going to rain the 49 stays in the dry but when I get caught out in it I find that with some creative operating techniques the vacuum wipers do a serviceable job of getting me safely to my destination.
I guess it's one of the main things that I like about cruising my 49, theres hardly any automatic anything with it, I actually have to manually start it & manually operate it.....
Dave