There are several options.
First the high beat options that are not correct beat wise. (AP movement is 21000, these are all 28800).
1. ETA 2824-2 Expensive but the best option.
2. Seagull ST 2130 Very good alternative, less than half the price of the 2824.
Low beat options
1. ETA 2824 modified to slow beat.
2. ETA 2846 (Slow beat movement, however these are all old movements, and will definitely need a service).
3. Powermatic 80 (Slow beat built by ETA for Tissot) also a great alternative, but pretty much unavailable as a movement, so have to buy a donor watch, which will probably set you back as much as the AP V5 cost.
There may be more, these are all that I'm familiar with.