o2bnkc, it does look like the vendors only have the chrome Valve covers. I looked at four sites. Try placing an add in
Trucks Parts Wanted Forum and looking in
Trucks Parts For Sale Forum for a used one. There should be auto demolition yards around Carson City & the Reno area. Might even try calling Golden State Parts in Carson City to see if they have any or know of where to find one. I think they are closed on Saturdays.
Nice looking
49 Truck you have there ... Michael