To replace your Sky Q remote control, please visit: https://www.sky.com/help/forms/replaceremote
To replace your Sky Glass or Sky Stream remote, please visit: https://www.sky.com/help/forms/streaming-tv-remote
(Note: you need to have a Sky account and be logged in. If you are using Sky Q, you will not be able to access the Sky Glass/Stream form and vice versa)
You can also have a look on Amazon, but you will need to pay for it:
UK: https://www.amazon.co.uk/s?k=sky+remote
Ireland: https://www.amazon.ie/s?k=sky+remote
Also, you can contact Sky to request a new remote. I found this site when searching for "Contacting Sky". It has the contact details. It's difficult to get the information going through Sky:
https://www.viewersvault.com/Contact_information_for_Sky_(United_Kingdom_and_Ireland)
