You could try the initial release of the stargate mod that is on I-mod.

I believe it is still available. At least that way, you get a number of stargate ships....

However, if you want to put just the deadalus into your game...... hmmmm, then the only one out there isn't the best one to use. From my view point, their model is difficult to put specular and Normal maps onto due to the texture of the model.

I was at that point at one time.

I did put together a guide for someone via PM... though it took ages.

I'll see if i still have it and PM it to you..... Can't promise it will help, but it seemed to do the job for the person i put it together for.