It's a bit more than the usual voltage. The MPSA44 / 94 JUST makes it but the datasheet doesn't give hFE @ low Vce and the '94 seems to be rare.
Any other candidates ? Cascoding could be problematical in this application due to volt drop ( I need a current source of about 6mA capable of handling a high voltage but with a low 'drop-out' voltage ).
Other packages could be OK but I may need TO-92 at least for dissipation reasons.
Graham