I used the cardstock picture and deckplan of the Light Heldannic Warbird from the Champions of Mystara boxed set (I believe it also appeared in an issue of the Dragon; Heroes of the Princess Ark series), but gave it the following stats:

[ Note: The deckplans are the same as for the Taripor Warbird. --ed ]

Name: Antilan Warbird
Built by: Antilans
Used by: Antilans
Tonnage: 125 tons
Hull Points: 90
Crew: 10/60
Maneuver Class: C
Landing-Land: Yes
Landing-Water: No
Armor Rating: 7
Saves as: Thick Wood
Power Type: Major Helm
Ship's Rating: As spelljammer
Standard Armament:
3 Medium Ballista, Crew: 2 each
2 Medium Catapult, Crew: 3 each
1 Bombard, Crew: 3
Cargo: 10 tons
Keel Length: 175'
Beam Length: 225'

No major changes need to be made to the deckplan key since it already had a helm room and weapons locations. I assigned a standard crew of the following Antilans:

Captain:
Fighter, level 1d8+1
3 Officers:
Fighters, Levels 1d6
4 Helmsman:
Mages of levels 1d6, specialists possible, usually War Mage kit. One will be at the helm, one studying, one resting, and the last will be battle ready.
Psionicists:
1d4 at levels 1d6+2 on a telepathic progression. (In a non-psionic campaign, use the Mentalist from Players Options: Spells & Magic.)
Priestess's of Gelanicus:
1d4 at levels 1d4+3, can spelljam in an emergency. They act as ships security and can override the captains orders in rare cases. (Flavor: Tal'Shiar of the Romulan Empire)
Additional Security:
3d4 fighters at levels 1d4+1, usually of the Marine kit.
Standard Crew (30-40):
1st level fighters (or 0-level humans) without weapon specialization, they also arm the heavy weapons.

Note: After an encounter or two, players should learn to recognize the rank of an Antilan crewman by the markings/style of their masks.

Still a deadly challenge, but a little more managable for higher level characters (This is intended for a role-playing encounter such as a boarding to search for escaped slaves or suspected Illithid spies.) These ships are also encountered outside the Antilan Empirer (which is near the sun), since they are not dependent on the Firefall's rays to increase its power.