If you look on EBay Model Ships Ahoy offers a fiberglass Littorio hull. Their hills are really nice. Be forewarned, It will take close to 8 weeks to receive after purchase. They will form the hull and cure before shipping. Just received a Nassau hull and it is very nice.
The one I had from them was beautiful. The shipping didn’t take 8 weeks it took about 3 for me. Depends on the time of year.