Yvan - Leaves and Roots has nice prices. I like the chart which translated ounces, drams, drops and ml.
I found ambergris at www.profumo.it. (And it seems to have come down in price - to 65.00 Euros.) The AMBERGRIS FRAGRANCE OIL on the Leaves and Roots website is a synthetic - a chemical replacement for ambergris which probably is ambreina.
My question is: does it justify the effort to make cologne if we use synthetics? The Basenotes Old Spice pyramid lists ambergris. My argument for making the Shulton formula is that Proctor and Gamble doctored Old Spice into something unpleasant, probably by substituting
'natural ingredients' for 'chemicals'.
I am going to rewrite my shopping list, determine quantities and prices, and probably order the Leaves and Roots version of ambergris (ambreina) because I am an amateur and can't justify that expensive of an experiment.
Yvan, if you have a spare moment, check www.perfumersworld.com.
Also found: formulator's alcohol on www.snowdriftfarm.com. It is expensive as ItalianStallion mentioned.