The flange I gave you the link to is similar to the on you are showing. With the exception that mine has three bolts that you tighten to compress a rubber ring to seal the joint. The one you have is just pushed into the pipe. I really don't think they seal well in old pipe. I don't under stand why the link isn't working for you. I just clicked on it and it opened fine. Try copying and pasting it in your search box. Here is a link to there home page just follow it to closet flanges.
http://www.what-if.com/SECURE/bruco/
and yes tap cons will work fine as far as fasting it down.
John