4x Dvd+rw

Who makes 4X DVD+RW media and where can I buy it? I have 1 that came with my Liteon 401 burner, but I’ve never seen it for sale.

Ricoh/ritek makes them.

Should be available some places in the US as Memorex 4X DVD+RW.

There may be other manufacturer of 4X DVD+RW media that I do not know of as well.