Rick,
I spend a lot of time updating our Haz/Dang & Non-Haz/Dang Registers onsite and it regularly ends up with a lot of angst getting 'compliant' SDS sheets & other info. All substances used & sold in Aust are required by WH&S Leg to have relevant Oz data and mostly this is found on the manufacturer/supplier's website.
In some case they go through a 3rd party website registry that holds the current sheets, but either way they must be updated every 5 years. Unfortunately, in some cases you have to directly contact the company (phone/email) for info.
Hope this helps.