That vent cover is a big one, something like 22×22 inches. It is not listed on the internet as available. We had a recent mishap while Jeanie was driving with a low overhang at a motel that took out the front cover of which you speak and one of the 160 watt solar panels.
A local RV shop replaced all the broken parts, and the solar panel was replaced by a 170w panel bringing us up to 330w of solar (160170w), plenty enough for our power needs without a generator.
2020 Ford F-350 XLT FX4 4WD SRW SB SC 7.3L Godzilla Gas TorqShift 10R140 397 amps dual Alt dual batts Frnt Dana 60; Rr Dana M275 E-locker 4.30's 4580/4320/4066# payload 7243# curb wt. 11,300# GVWR 5-er prepped. 2020 Northstar Laredo SC, 12v compressor fridge, cassette, 320w Solar sub zero insulation.