I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/thread/3300?tstart=0
Come back if it that doesn't help either.
I do apologize for any inconvenience you've had with getting the proper SlingRemote to use with your Slingbox and cable box. If you don't see your exact model through Setup on Slingbox.com, usually you can select a similar model that will work for you. However, if this is not an option for you, we do have an Enhancement Request community right here within our forum where you can make a remote control request. We have a team working on adding remotes to our database and they base the additions on feedback and input from that community.
Here is a direct link to our Remote Request section:
Also, you can always check to see what new remotes are added and get all of the latest Sling news here:
Hope this helps!
The Sling Moderation Team