Based on this product's specifications, here are some alternatives and similar models
Memory module 4GB DDR3 PC3-12800 1600MHz 240-pin DIMM for PC/Server, IBM 03T6566
Summary description:
IBM 4GB PC3-12800 DDR3 240-pin DIMM — 4 GB internal memory module for PCs and servers. Operates at 1600 MHz (PC3-12800) in standard 240-pin DIMM form factor. Designed for system memory expansion and replacement in compatible desktop and server motherboards supporting DDR3 1600 MHz modules.