Thank you for your post and welcome to the Bose Community forums.
Within the USA, while the premium backlit remote (part number 353744-0010) is no longer available, we still do stock and supply the standard Wave Music System remote (part number 344762-0010 in white, or 344762-0020 in black).
These can be purchased by reaching out to support directly via the telephone. Within the USA, our phone number is 800-379-2073. Additional contact methods for our global customers can be found via our website HERE. Select your location and use the "Contact Us" feature at the bottom of the page.
Please do let us know if you have any additional questions!