Cowl Vent Mouting pieces?

[louder50]

I am getting ready to install the cowl vent between the hood and windshield but mine is missing all the plastic pieces and the 2 brackets for the screen. It looks like some of these are available through Classic Ind. but they're $13 ea so it looks like I will have over $80 into about 4 grams of plastic nubs and a couple little brackets. Anybody know a better, cheaper source? All the junkyards around me have crushed everything this old.