Have you tried GRO?
Genealogy Scottish family birth records census ancestry Scotland uk - ScotlandsPeople
The service isn't free, but as long as you marshall your questions before you sign in, it isn't too expensive. It has many of the Old Parish Records as well as census info.
Please do not assume that any underlined links in my posts are MY recommendations. They are not. It is this American site taking advantage of members' posts about Scotland to boost their advertising revenue.