First, what kind do you have in mind? A 20 inch barrel with built in carry handle like you had, or a better more modern style with a heavier barrel and a flat top that is easy to mount flip up sights and optics? You can also go with a 16 inch barrel.
Here's an A1 style like you had.
"Vietnam Era" AR15 - .223 #AR-C15
Here's an A2 style. Basically a heavier barrel and different rear sight. Still has carry handle.
AR Star-15 Rifle .223
Here's an A3 style. Same as A2 but with a flat top that makes it easier and more comfortable to mount optics and allows you to have flip up rear sight that's very compact.
AR Star-15 Rifle .223 A/3
Here's an M4 type with 16 inch heavy barrel and a carry handle like the A2.
AR Star CAR Rifle .223
Here's an M4 type with the flat top.
AR Star-15 Rifle 16" A/3
I strongly suggest you buy a flat top version. If you really want a carry handle, there are detachable carry handles that you can buy to go on a flat top. However, you still have the option of mounting a scope down lower than you possibly can with a carry handle, and lower is more comfortable by a long shot.