When i got my Iphone 4 i looked on ebay for a clear hard gel case, got one for £2 inc p&p as for screen protectors as with my 3GS i just got a pack of 10 off ebay for £1.70 and iirc had to replace them every 2/3 weeks, my phone lives in my pocket or top of my tool box at work (no one wants a burnt weld mark on the screen lol) there are loads to choose from on ebay mate