Hardware Upgrade/refurb

Hi,

I would like to have the following work done on my Inspiron 1525:-

• New Wirless adapter as current is broken and crashes periodically
• A new keyboard as the current one is rather mucky
• An upgrade in memory as I am constantly getting "Low memory" error

Could you please tell my how much this would cost and how I go about it?

Many thanks,

Jonnie :)