A Chinese site says this about the P2003EVG; 30V 9A SOP-8 PMOS, replace the SI4435, FDS4435, APM4435, AO4415
If you can find any of these they are more powerful than the original.
(P2003EVG 35mΩ(@ 4.5Vgs) 20mΩ(@ 10Vgs) -3V(gsTh) -9A 2.5W)
P1403EVG 22mΩ 14mΩ -3V -12A 2.5W
P1203EVG 19mΩ 12mΩ -3V -12A 2.5W
P1003EVG 16mΩ 10.5mΩ -3V -13A 2.5W
P0703EVG 13mΩ 7.5mΩ -3V -17A 2.5W