I have a 16" 96 Cindercone with triple butted P2s, I can measure the steerer later in the week. PLUS I needed P2s for a 14" Hot, bought the 16" as a donor but ... was concerned that the steerer might be too long...
Are yours triple butted, because depending on relative condition, perhaps a swap?
At the least we can compare notes!
Bikes : Orange Prestige '92 : Orange Clockwork '89
Chas Roberts mtb '89 : Roberts White Spider '91 : Roberts DOGS BOLX '92
In Bits : Too many to mention but includes a Fuquay, a Pace and a Yates I really should do something with!