In article , Mike
writes

"Lobster" wrote in message
...

At this point I really don't know what the hell to do. Digging out the
broken clay pipe

Is the pipe broken below floor level ? If not try to cut it off with and
angle grinder to restore a clean edge and then go off to your local
specialist plumbing merchants and they will sell you a 'precision fit' (i.e.
hammer job) fixing which slides inside and provides a new fresh standard
ring connector on the other end. Of course this will be for PVC pipe so
you'll then need to convert this to the steel pipe which hopefully they can
also provide.

Sorta like 12710/12716 he
http://www.bes.ltd.uk/products/121.asp (near the bottom)
but sized for your steel pipe, sure your merchant will find something if you
go armed with the right measurements. Mentioning you want something
like a WC pan adaptor but different might save on the explanations.

--
fred