It appears that the problem lies within your use terminology for "approved" versus "TSO'ed." Be careful with that as there is sometimes a reason for it.
Have a look at the very last page of the above publication and you'll see that the Microair transceiver is listed there.
http://microair.com.au/admin/uploads...Aapproval1.pdf
The Microair as an example was approved by CASA before TSO testing was invented, back in the 90's so it's not TSO'ed but it IS approved.
The Microair transponder on the other hand, is TSO'ed as it was manufactured and approved after TSO was invented.
You'll need to do some careful research to determine which instrument is right for you based on information from the manufacturer.
Based on your evidence and articles my jury is out on whether or not experimental needs TSO'ed anything for Day VFR.
When you work it all out let me know as I'm about to buy some stuff for NVFR
