Previous stock codes for CR9?

Does anyone know what the previous stock codes for CR9 were? I need to sell (at a massive percentage loss) but I have no idea what the stock code was when I first bought these shares way back when. The previous code was STC, but I believe I bought these shares before then, so I need to know what the stock code was before that. I've called the company but no luck there. Any suggestions gratefully accepted.

I pretty much know what my losses were from my edited buy price in CommSec, but it would be better to know the exact figure. My buy price was about $0.724 according to CommSec. Luckily I only bought 10,000 shares, but that is over $7,000 down the gurgler.

And the more I think about it, I will need to quote the original stock code for my tax return, so I will need to track it down no matter what happens.