Every entry below points at the publisher's own download endpoint — Microsoft Update Catalog, NVIDIA, AMD, Intel, Realtek and the rest. Links are opened and checked by hand; the date shows the last check.
The catalog tracks 1 Roland package, each one a link to Roland's own download page rather than a mirror. The version, supported Windows releases and last check date are recorded for every entry, so you can confirm a build before opening the publisher's installer.