How much of the Dungeon Set 1 (Specifically Shadowcraft) is still available?

I believe they removed the ability to get it, but they didn't take it away if you already had it.

I have looked into the Shadowcraft Armor set, and while my original thought was that you can still obtain all of the items, the Shadowcraft Cap definitely appears to be no longer available, but it does have the Stained Shadowcraft Cap option available. However, other options may not be available according to the following quote from Wowpedia:

All items that compromised Dungeon Sets are no longer dropping from their respective locations. The reason for that is currently unknown as Blizzard gave no clear statement on that matter.

Here is a list of the items, and the locations where the items drop:

• Shadowcraft Belt - Trash Mobs (Blackrock Spire)
• Shadowcraft Boots - Rattlegore (Scholomance)
• Shadowcraft Bracers - Trash mobs (Scholomance)
• Shadowcraft Gloves - Shadow Hunter Vosh'gajin (Lower Blackrock Spire)
• Shadowcraft Pants - Baron Rivendare (Stratholme)
• Shadowcraft Spaulders - Cannon Master Willey (Stratholme)
• Shadowcraft Tunic - General Drakkisath (Upper Blackrock Spire)
• Stained Shadowcraft Cap - Heirloom Helm (Requires Guild Level 20 and Honored reputation with your guild)

• Stained Shadowcraft Spaulders - 2175 Justice Points or 60 Champion Seals
• Stained Shadowcraft Tunic - 2175 Justice Points or 60 Champion Seals
• Stained Shadowcraft Pants - Currently Unavailable