You can also get air cored inductors from Audiocom- http://www.audiocom-uk.com/ but they are a bit expensive and the last time i tried ordereing from them the website broke, so best avoid.
Yes they used to stock Tritec and Intertechnik inductors. However if you take a look now they've been removed which is probably a good thing since they were ridiculously expensive and, as many others have pointed out, its cheaper to buy from the Netherlands/Germany.
It might make sense to wind your own for really big inductors and large wire gauges. Looking for a 2.4mH 12ga coil, I found a spool of 12 ga magnet wire on eBay big enough to wind three for a little more North Creeks' price for one.
Smaller inductors and retail price for wire don't make sense to me either.
