Until now I haven't found anything. I once tried to convert the new Galactica and Cylon Basestars but got the problem to give justice to the point defense grid. Railguns were no problem so far. Perphaps I can find the stats I wrote somewhere on my pc. 

------------------------------------------------------------------------------------------------------------------------------------------------
That was my guess on the Galactica:

This isn't Starmada, but SFB(ish).....

http://www.fluency.paintedtarget.org/bsg/index.html

I think the primary thing is that the ships be consistent with each other, and don't obsess over trying to get it "in line with the series" - like most Television SciFi, it's woefully inconsistant and short on details.

If you wonder how certain things are supposed to work, ask. I don't know if you've played SFB, but I've had my butt handed to me by a Marine Staff Seargeant who loved Kzinti (not to be confused with Kzin)....

If you come up with a good conversion, maybe we can use it in the Space Fleet Omega setting....

It seems to me, based on screen evidence, the Galactica's main railgun batteries would be a perfect example of a dual mode weapon system. Reduced range, reduced damage area effect for the defensive flak mode best seen in the pilot (and a few times after), and a longer range, higher damage anti ship mode.
Erik

Another problem is the Cylon base star. We see it continously lob normal or nuclear ordonance. Strikers and seekers would represent those missiles very good but that seem to be all weapons a base star mounts. No guns or turrets, only a missile tube and massive waves of raiders. The ship would come out very expensive due to a carrier score of mere 1000 or something. As an alternative, to simplify a base may mount an rof 4, slow loading 360° missile tube and raiders.

Something like that: