The proliferation of cheap chinese trailer tires has made blowouts and subsequent fender destruction a fairly common occurrence these days. If you have a good local trailer supply he'll likely have something similar in stock that can be adjusted to fit. Won't be exactly the same, but these are a fairly common item. You'll need to drill your own holes. Here's a similar one:
https://www.etrailer.com/dept-pg-Tra...-CE_Smith.aspx