Never mind about syncing it, I see you said you didn't have the remote.
Discussion
I’d really rather have an old wired model. Up or down is fine with me. I don’t need to know the number.
I don't have any particular special access for parts on these types of items from the manufacturers, I just have to call in as an owner. I think it would be easier if you call them to try to get the original part unless that exact model came both ways.