200tdi triple crank pully onto A 2.5 N/A 90

,After noon to you all, in the middle of fitting p.a.s to my 90,got box ,pump,brackets,hoses etc but hit the first problem when i mounted the pump, my landy is a ex military ffr 90 and runs a double pully ,,,,,,,,,
having removed the 24v alternator i was hoping the second pully would have ran the pas pump,,,but not so,,,so i need a triple pully,,
so as my title says does anyone know if a triple pully from a 200tdi fits !!
thanks in advance ..............bob