If you want to scratch build another for old time sake, you can download the plans for free. You will have to obtain the required materials such as nose cone, body tube, couplers, fin stock (balsa or basswood sheet), and recovery components (parachute, shock cord). Most items can be obtained from a craft store and the tubing can be found on many web sites. I like
Uncle Mike's Rocket Shack personally. If you do decide to do this, I suggest getting some Titebond II which is very strong and sets up quickly. Basswood is my favorite fin material as it's very strong and needs little prep for painting. I also use
mat board for centering rings. It is very strong and cuts easily. An easy alternative is to purchase a motor mount kit. It will come with everything you need such as motor tube, engine block, motor retainer (possibly), and centering rings. You have to specify what body tube it will go in so you get the right one. The 1500 looks like a great kit and I may just end up building one from scratch. The fact that it will launch on 18mm motors is very nice. You can get a low and slow flight or if you really get into it, you can purchase an 18mm reloadable motor and go even higher. Aerotech makes some really good hardware in that category.
Estes Cobra-1500 #1294