Remington and Winchester still produce it, 100-grain only. $35 a box from Wholesale Sports, IIRC. I just saw a dozen boxes in the Kenora, Ontario Canadain tire at about $27.00 a box.
It is easy and fun to reload for. If your rifle is modern it will have 1:10 twist rifling. Older (pre-1960) rifles have 1:14 twist. I have had GREAT results with Reloder 15 and any flat-base cup'n'core bullets in older rifles. As examples, the Rem PSPCL 100, Sierra and Speer flatbase 100's, Hornady flatbase 100 and 87 grainers. DO NOT use Partitions, Ballistic Tips, boattails of any sort, or Barnes Bullets. They will not stabilize in a 1:14 twist rifle as they are too long.
Newer rifles will shoot any weight up to 120 grains.