I just fired out a couple of emails to the usual suppliers (I had heard a rumour!!) ----- so far, no responses.
I did have a look at the SFRC Website; they have a variety of M305's. Call me "#frugal" (AKA cheap) but my thinking is the extra $100 or so that is being commanded by SFRC (seemingly above every other supplier) would be better spent in accurizing an M305 that I've waited a couple of months for.