Duct hoses for '72 Valiant

Hello,

I'm trying to find some replacement hoses for my dash vent defroster and heater hose. Anyone have any suggestions? I can't get to the dash vent at the time but they look to have smaller connections than the connections below the glove box. Classic Industries.com have a listing for some, but 50 bucks seems kinda pricey for 2 hoses.

There going in a 4 door '72 Plymouth valiant with no A/C. If anyone knows the exact measurements that would be helpful too!