As Freddy says many different movements can be made to fit many different cases but some with more time and effort that others.
Some of the more important dimensions you need to consider are the diameter of the movement and the stem height ( the distance from the front of the movement to where the winding stem enters.)
The modern ETA movements ( 2892 and 2824 ) are both 26mm in diameter but the Rolex movements are larger ( 28.5mm for the 15XX series and I think the same for the caliber 1030, somebody correct me if this is wrong )so you would need a spacer ring/adapter around the ETA movement. I have seen these but I don't know how easy they are to get.
The stem height of the ETA 2824 is 1.80mm, and the of the ETA 2892 is 1.50mm. I haven't been able to find the stem height of the Rolex 15XX or 1030, maybe someone else knows.
regards
TudorKing