Small Form Factor Looking for a small quiet psu

I was clearing the store at work and found an old MSI 5148 atx S7 mobo with 32mb EDO ram, P200mmx and a 2mb ATI pci graphics card. As far as I remember these were in PCs we bought in 1998
What i want to do is replace my current smoothwall box (800 duron, 128mb Ram, 10 gig hdd - this will become my media server) with the above but I'm looking for a very small quiet psu.
I'll be using a 4gb 2.5" laptop hard drive so there will be very little power required.

I was thinking about something like this http://www.kustompcs.co.uk/acatalog/info_1770.html

I'm trying to do this as cheap as possible. so that's a bit on teh pricy side

Any ideas?

 

You're really not going to get any quieter than that as a cheap ATX PSU will include a noisy 80mm fan. £25 really isn't too much.

 

It is when I spent nearly £80 on an Antec Neopower for my main rig