These are my custom, super duper cheaty savegames with lots of Battleships and fleets all maxed for your skirmish needs.
1 Fully upgraded Admech IN fleet with 6 battleships and 3 battlecruisers.
1 Somewhat less edited out IN fleet with mostly SM favour.
5 Fully upgraded Chaos fleets, one Undivided and 4 for each god with 4 battleships each.
2 Ork fleets with lots of battleships, fully upgraded.
1 Fully upgraded Eldar fleet.
1 Fully upgraded Earth Caste Tau fleet.
3 Fully upgraded SM fleets: DA SW BA.
1 Fully upgraded Imperial Fist ship list with 6 battlebarges and Angry marine names (Warning, includes lots of profanity).
Some other misc fleets.