Non-profit digital libraries occasionally host user-uploaded copies of out-of-print media. Searching the Internet Archive for Roadside Romeo can sometimes yield DVD rips that preserve the English audio track.
If you search for "Roadside Romeo English dub high quality" online, you will likely encounter a mix of broken links, low-resolution uploads, and forum threads of fans searching for the same thing. There are several reasons for this scarcity: roadside romeo english dub high quality