Are B20/20 tables from the 2010 Labour Force Historical Review available online, or only on CD (71x0004x)?
Most, but not all of the tables are available free in CANSIM. The LFS series starts with 282. You can download the CANSIM tables in IVT.
Unfortunately there is no list of which tables are missing. There is limited space on CANSIM and some of the tables had too many blank cells for the provinces, so only Canada data was loaded.