Want To Buy DDR3 1600 mhz ram needed.

[vampelle]

Exisiting pc is Lenovo m92p sff.

i already have Kingston value 4gb ddr3 Pc3 1Rx8 1600 mhz and Samsung 2gb ddr3 PC3 1Rx16 1600 mhz.

Manufacturer PartNumber SerialNumber Speed
Hynix/Hyundai HMT425U6AFR6C-PB 2F85A4EF 1600
Kingston 99U5584-005.A00LF 8D2A617C 1600

Need:

4gb ddr3 pc3 1Rx8 1600mhz single stick, which can match and work as a dual-channel with the existing ram Kingston.
or
Gaming ram 4gb x2 1600 which will be dual channel support.

need lesser than market.
thanks.

location Karachi.