Try eBay, I managed to get a screen that fits the A10 A20 A30 A36 and S10 imported from Japan it only cost £17 with P&P, however the average for these replacement screens is £40 odd. Oh and the ones from Japan come with tools for opening the camera.
And as for how difficult it is to replace all depends on if you have a steady hand or not, I tend to use a magnetised screwdriver to avoid losing the screws.
Word of advice don't touch the flash capacitor it hurts.
G-string8086, May 2009
