You could try one of these in the link below. If none work, I did see in a post that EchoStar would email you the 124R firmware. However, that post was from 2 years ago.
Thanks ms.T for your reply which was quicker than I expected but I have already trawled the forum and knowledge base including both of the links that you kindly provided & EchoStar support no longer appears to exist. One of the phone numbers states this on a voice message & the other number is now a company called Smardtv.
I have emailed one of the members but unfortunately the forum will only let us pm friends.
Is there a kind member that could let me have a copy of the 124R Software for my HDS-600RS Slingloaded Box.
I have looked everywhere and just cannot find it anywhere.
It would also be useful to have the 123R firmware just in case if possible.
Thanking you in the hope that someone can help please.