Cheaper alternative to KTD-DM8400C/2G?

[realepicurean]

Hi all,
I'm using a Dell E520 and want to take my current 4gb memory up to 4gb. I've read on the net that it can be done, and the Kingston website recommends me their KTD-DM8400C/2G modules. Unfortunately, they're over £40 each - I may as well just buy a new computer as install four of those.

Any ideas how to take my memory up to 8gb, with the same speed but cheaper price?

 

[realepicurean]

**EDIT - actually, realised I've posted this in the wrong forum. Please delete this, I've re-posted in the correct place now**