A1280 battery replacement UK?

Hi there,

I have a Macbook 13" aluminium, Late 2008. Running El Capitan.

The battery stopped working in 2011 but I continued running it off the power cable. This year I decided to purchase a replacement battery but realised that Apple no longer supply them (I am keen on purchasing a battery that is as genuine as possible..).

I opted for a battery from LiZone off Amazon. It worked fine and kept moderate charge for what I needed, but this week I noticed that my trackpad was become unresponsive, having to click really hard to select things. I then removed the battery and the trackpad worked fine and is much more responsive. The new battery is not swollen, and it fits fine in the slot so I am unsure what the issue is.

I am contacting LiZone to explain this to them but in the meantime, I would like to know whether anybody knows of a certified/trustworthy supplier of the A1280 battery for the Macbook (13")? I need a UK supplier as based here. It's hard to trust Amazon with all of the fake positive reviews so I would really appreciate your help!

Thanks!