Wanted :: Acer Aspire 7520G Laptop parts

As per title I am after a couple of Acer Aspire 7520G Laptop parts as cheap as possible.
In fact I have set myself a target build price of £50 and to date have spent £25 !!
I'm fairly certain I now only need the 160G (or above) Sata Hard Drive with serial ATA interface and the Graphics Card, which I believe is an Nvidia Geforce 8600M or 8400M 512 MB Video Card LS-3581P ICW50.
Or if there are any suitable substitutes for these parts that anyone could suggest that I could look out for.
Thanks in advance for any input. : thanks :

I think you'll struggle with the graphics card, they go for nigh on 100 quid on the bay, as they are quite desired, ive got a similar problem with an acer 6930 here, it needs a new screen and because its an odd size (16 inch) they go for silly money on the bay

Thanks for that @Busta_Gonad you don't know if there is an alternative I could search for do you ?
I chose the Acer Aspire because several sites said they are not worth repairing because they are the cheap end of the market and so I thought I would be able to pick up the parts cheap because people would be dumping their old laptops, which I found true with all the parts I have managed to get so far.
I had also read that building a lap top was much more difficult than a desk top because many tended not to work once assembled which was my main reason for setting such a low budget (well, that and I couldn't afford any more than that).
Besides it has kept me occupied and I think is helping improve my concentration levels which were completely shot when I had a breakdown and it also helps me feel that I am not completely useless although it takes me much, much longer than it should do.