I think Deathsnake is refering to my post over at the WingCenter regarding the Landreichs size.
Frankly I don't know the exact size of the Landreich. From the novels I allways had the impression that its very small. Also as mentioned above, the map is the Prophecy-time map. I don't know if the Landreich was this big in the past or if it might have been even bigger or smaller. We pretty much don't have any answeres.
The other thing about this map is, there are a lot more starsystems in it then in the original Prophecy map. I think they put together parts from all games, novels etc.
Still if you want to take it as a basis for the mod its the best way to start as we don't have much else.
Concerning what the Landreich has when it comes to its fleet size its pretty much what Deathsnake says...as its more or less what I posted over at the WingCenter. ^_^
If you go with the novels the Landreich uses mostly old stuff that they bought from Confed but it also seams that they use a lot of junk they find and put it back together.
When it comes to the number of carriers, Confed is even using ships as old as the "TCS Victory" and others of its class. I would say that Confeds willingness to sell carriers that are even better then these old rust buckets is pretty low.
Most likely the Landreich might manage to salvage a carrier or buy allmost not repairable, by Confed standarts, carriers and put them back together. Add some extra guns to it, rember the external gunports that they put on the Tarawa, something like that and patches of armor over the bigger holes.
Buying intakt carriers or even battleships from Confed...well I doubt it a little bit. Might happen that they manage to buy one or two of them but not much more.
The Landreich might also have converted ships like the "TCS Tarawa" or the Durango class. Putting external boxes that are beeing used as runways on Exeter hulls. Not like the Standoff team that cutted out a part of the hull. I mean a real add-on flightdeck or even just "clamps/external docking ports" where the pilots have to go out in a spacesuit to their fighters. Be creative, think of people who have no real weapon production or shipyards. Improvise ^_^
I would guess that the Landreich militia would consisst mostly of destroyers and corvettes as these where pretty common during the entire wartime. Add some cruiser to it and maybe one or two battlecruiser like the Gettysburg. It would also be one of these rare moments where you could show one of the old battleships that where used before the invention of the shield brakeing torpedos. They would most likely look like the Concordia from the Wing Commander Movie.
Still could be fun to see one of these around ^_^
As for the Kilrathi ships, I think there was a passage that mentioned that Ralaris where pretty often captured by Confed forces. Wouldn't wonder if the Landreich would also do that.