DDR3 SODIMM Laptop memory 4GB (Woodley RG5)

Hello, I've just acquired an old laptop which is running Windows 7 Pro 64bit on and it only has 4GB of RAM in it. For the things I plan to do with it, it would be much better with 8GB. Before I buy some, I wondered if anyone had any going spare. I need DDR3 204pin SODIMM PC3-10600 2Rx8 - a matching pair of 4GB is recommended but I'm willing to try just adding a single 4GB to the one inside if you only have the one.

I am in Woodley and can cycle to most neighbouring towns to collect at almost any time suitable to you (or collect from outside if you wish)

Thanks,
Chris