I've been trying to send this along to y'all since yesterday, but Patreon keeps crashing every time I try. :(
Short version: I'm still adapting my Castle Blackmoor material for articles on the Alexandrian (with design notes and the like). But I want to get the full package into your hands ASAP, so I've attached my working notes in a Word document.
As noted on the Alexandrian, you will need a copy of the Blackmoor dungeon maps to make full use of this material -- either from the 1977 First Fantasy Campaign or the modified, but still usable, maps found in Zeitgeist Games' Dungeons of Castle Blackmoor.
Even if you don't have those maps, most of the attached material can be used to stock and run ANY set of dungeon maps prepped along megadungeon lines. So you could grab Undermountain or Castle of the Mad Archmage or Rappan Athuk and just roll with it.