Hi Ozfly - the wire is (I believe) manufactured by a Danish company called OdiO. Below is a link to a Chinese website (written in English) which distributes the wire.
THL Audio
You can at times find this wire available on Ebay (but the seller does not share information about the manufacturer).
Do a search for "Pure Silver Wire" (or click the link) and it will turn up a dutch auction for the wire sold by the foot or by 10 feet sections. The price is usually $1.60 per foot for 24 gauge wire which includes equal lengths of teflon tubing and "special" silver solder. 20 gauge wire is about $2.70 per foot.
THL Audio
You can at times find this wire available on Ebay (but the seller does not share information about the manufacturer).
Do a search for "Pure Silver Wire" (or click the link) and it will turn up a dutch auction for the wire sold by the foot or by 10 feet sections. The price is usually $1.60 per foot for 24 gauge wire which includes equal lengths of teflon tubing and "special" silver solder. 20 gauge wire is about $2.70 per foot.