This edition often supports widescreen resolutions (1280x720 or higher), making it look crisp on modern monitors. The lifebars, power bars, and screenpack graphics are custom-made to fit the "War of the Worlds" aesthetic.
The most reliable source is the Internet Archive. Search for snk-vs-capcom-ultimate-mugen-3rd-battle-edition-v30. Look for uploads from known MUGEN preservationists. The file size should be approximately 3.5 GB to 4.5 GB (compressed). Avoid any file under 2GB—it is likely fake.
Visit the r/MUGEN subreddit. Search for the "SVC Ultimate v30" thread pinned in their resources. Users there maintain a Google Drive link with the definitive, pre-patched v30 that includes all missing stage and sound fixes.