Legacy is a very nice paper but not so warm as Ilford Warmtone and it does take selenium and gold toning very nicely. I used Legacy to print the images I made at Roughting Linn with you Leon and they look good. I do know who manufactures it but cannot tell you other than to say that it comes from a very good paper producer. Their chemistry is very similar to the standard Ilford stuff but they also do a warm tone developer and a two bath developer, both produce really warm prints. I know what the two bath developer is for I gave them a formula that I made up myself and they used it for that dev. If you try it don't use their dilutions, they're not that good, instead send me a private email and I'll tell you what I use. They will do mail order in the UK.
They were represented in the US by Luminos but it would seem that that has ended, when I next talk to them I'll find out what the situation is for those in the US who might like to try their products.