I will try to find the mail address of this school for you. I don't think that you will want to study here, but maybe you can try to contact them and ask them about some literature. Clausens Forlaf, Aschebourg. I'll send you a more complete list as soon as possible. There is a specialised school in Paris but only for youngsters.
Some dealers are active in France.
I said to Adam that I'll send to the Web site some technical drawings of old lab vessels found in Paris and made during the Middle-Age area. You need a furnace that has a cavity as large as the object for annealing, and another furnace for melting the glass and for intermediate heating of the object. You can make beakers or retorts using this method. I would guess a couple of years of apprenticing would be required plus a substantial investment for equipment. For instance, a retort could be made by selective heating of a long-necked flask.