You can get fully legal pressed plates yes dude.As with any official number plate supplier you would have to supply them with 1 peice of identity for both yourself and your car.Best thing to do is take your drivers license and V5 to a show (if you go to any) as most shows have somebody making them and it saves posting away important documents.The main two places that do them are:
http://www.europl8.net/
http://www.dubmeister.co.uk/
Theres quite a few people that have had problems with dubmeister around my area (Wrong plate surrounds sent,documents sent back to wrong addresses),fortunately i bought mine from Europl8 at a show this year and they were spot on would definately reccomend them to you.
Hope this helps
Brad