Here http://www.ebay.co.uk/itm/STICK-ON-NUMBER-PLATE-REGISTRATION-CARAVAN-TRAILER-BOAT-DEFENDER-SUZUKI-/201551215129?hash=item2eed637a19:g:ylwAAOSwT6pV5aGZ
To be honest mate don't jump strait into forging do an td04 conversion other supporting mods learn along the way as forging is an different ball game. you will have to forge it after 250hp it will take 220 230 250hp stock all day when tuned properly
Mate your thinking is spot on a cage like that wont save you from anything except just looks and that's what its purpose is. Is it worth putting it in your car I wouldn't for the exact reasons you have stated above.
Td04 will work fine on stock internals with a good map and supporting mods. You will need to uprate your pump to an 225 LPH 320cc injectors fuel presure reg decent td04 kit decent piggy back and map