any ideas on a 330mm 27.2 seatpin with 40mm or more setback

Look Ergopost 4 or Ergopost 4 Ti meets your requirements (and is adjustable beyond 40 mm setback). except it is only 300 mm.

You could get a custom Bold Precision with 40 mm setback and your desired length
http://www.boldprecision.com/custompricelist.htm
http://www.boldprecision.com/diagram.pdf

I'm sure there are plenty of other options, perhaps better, but this will give you something to fall back on.

Bold is an option