Redracer have you checked out the Prologo Nago Evo Plus in wide? Looks like it might fit.http://www.prologotouch.com/prodotti/nagoevoplus.html
Thanks for all the replies.
I haven't tried any Prologo saddles mostly because I assumed that no saddle without a cut out would fix my problem.
The same applies to the San Marco Regal-E which is no doubt a great saddle but I can't imagine it not causing me
The Selle Italia SLR Super Flow 145mm wasn't too bad in terms of numbness (still didn't eliminate the problem) but I found the saddle quite uncomfortable after ~45mins. If it was ~10mm wider it might have been the one!
Has anyone tried the new Fizik Aliante VSX Braided or Arione Versus X ? "A 20 mm deep channel design allows a greater pressure relief..."
sound promising and Fiziks seems to have a great reputation.
To touch on a few other points:
I did a have a professional 'fit' done and it seemed to make things worse! Of course not all fits or fitters are created equal but the selection in my area is limited.
I can say for sure that I slouch a bit on the bike.....always have and I don't know how to avoid it. One idea was to install a longer and/or lower stem which would force me to stretch out (I am reasonably flexible) but at this point that rotates my hips forward and makes the saddle discomfort even worse! I find that I hunch/arch my lower back to 'protect' my groin by rotating my hips backwards into a more upright position. Of course this causes lower back discomfort after an hour and is bad for aerodynamics. What a mess!
In testing all of these saddles I have been setting them up very precisely with a digital angle gauge to the mfg's recommended setting and then playing around from there.