You can find Opera Mini in Openrepos
It is Opera Mini.

The problem with SSL and websites using it come from expired certificates. I haven't found a convenient way yet to solve it.
The only thing you can do: Find out what root certificate the website uses. Obtain it by googling and install it on the N9.

If anybody knows a website with a nice list of current certificates for the N9 I would be very thankful Maybe we can create such a list by ourselves. A wiki page?