Original Replacement Tires

[KMK454]

My truck is currently running Firestone FR380s which appear to be discontinued. They're showing their share of wear and tear and are in need of replacement. I want to keep the truck looking original... here is how it sits now:



Here is what I think might be an original spare tire that I pulled from underneath the truck... a Uniroyal:


I don't care if it's a modern or updated tire; I'm just having trouble finding a 235 width white wall tire in 15". Anybody have any recommendations of a stockish/original style white wall tire?