There is a company selling a retro case. Why this is popular is beyond me.
Via The Sun:
OWNERS of the slimline iPhone can now turn their gadget into a 1980s-style "brick".
The chunky devices were the first widely-available mobiles and became a massive hit with City bankers and yuppies.
The phones weighed over a pound and had eight inch-long batteries which lasted just 15 minutes. But originals now fetch more than £100.
British gadget firm Thumbs Up has created a £12.99 plastic cover to mimic the iconic brick.