When building a 61 foot sailboat mast out of Sitka, I ordered spar grade from Maurice L Condon in White Plains NY. They called back and said they were out of spar grade (certain knots and runout allowed) and would we take aircraft grade at the same price. Well, Duh. They said they had 80 foot lengths if we could ship them and of course we could not, so they cut them to 38' to fit in a 40' truck. The grain was amazingly straight and there was virtually no runout.
Those in the NYC area could try them -they must have cut-off. No affiliation, yada, yada, yada
http://www.condonlumber.net
Ed