they are a legendary speaker manufacturer for sure.
There are so many however.
For example Great Plains Audio (who are former Altec staff with the Altec machinery from the old factory) produce brand new Altec drive units and sell them.
This includes the famous 604 dual concentric (which many prefer to the Tannoy version), to brand new compression drivers, horns and alnico bass cones.
A DIY vintage vibe can be had for those that want it, with brand new drive units.
I'm mentioning all this because this thread may be read by such people here in the UK who perhaps haven't considered Great Plains Audio.. not because of the ''Ebay Lunacy'' title of this thread...
http://www.greatplainsaudio.com/