Thanks everyone for your replies
I'm not sure if anyone cares or not but this is what I ended up doing:
Went local hardware store and bought the following:
Die Grinder for hand drill. - 5.98
3" PVC SIPGOT Flange - 3.93 (this is name on the reciept)
Jumbo wax Ring - 4.98
Achors - 6.48
PVC Cement - had some already.
Here's a pic ..
The DIE Grinder is the thing on the Drill. I cut below the crack on PVC the soil stack (i think that's what u call it).
The 3" PVC SIPGOT flange is the white thing on the right.
Set the new PVC SIPGOT flange with some PVC cement
Anchor to PVC SIPGOT to floor.
We are good to GO now...