I have no problem with that at all, it just wouldn't be the original Republic, or the original Sith, if you know what I mean.

So you'd have the ideology of the formers, perhaps same or similar values and such, but the original still exist, they just stopped going on the offensive. If you could get a pure alliance with the Republic Remnants, they may give you access to their ship designs and schematics. Currently the Republic Remnants, Imperial Remnants, and Sith Remnants (In this roleplay the Sith will be referring to the Sith Order, like the Jedi Order, where the darkside is practiced and had control over the Empire) hold the ship designs to the most powerful ships. Padawans, and especially Jedi's in training, would have the designs and schematics to certain Jedi-specialized ships. Jedi's in training would have knowledge of ancient (From the Old Republic era) ships, this way they are not stuck somewhere randomly, they just need someone to build them ships.

Gisk, you would have knowledge of the [url=http://starwars.wikia.com/wiki/Crucible/Canon]original Crucible[/url], [url=http://starwars.wikia.com/wiki/Hammerhead-class_cruiser]Hammerhead-class Cruiser[/url], and the [url=http://starwars.wikia.com/wiki/Whitecloak_fighter]Whitecloak Fighter[/url].

Depending where you are, it could be fairly easy to get someone to build you one of these ships, or near impossible. There will be two generic ship manufacturers left, and one major that will also be an Organization (neutral towards Republic/Empire).

Those who have designs and schematics know how to retrofit "current" weaponry/equipment on the older ships. "Current" meaning the technology era they were thrown back to.