You think mate, i'm really unsure lol, depends what I can afford haha.
As for the plates,first off take your old plates off and hold them up to the bumper/pate recess, make sure the curviture is the same, if not bend the plates ever so slightly and carefully so you don't crease them but so they fit the recess correctly, you could probably just use thicker bits of tape at the edges than the middle if bending them scares you.
Then if you go to a motor parts shop(I got mine from a local Wilco Motosave which is a bit like Halfords but cheaper and usually has more technical stock rather than full of ripspeed shite lol) and get a roll of body trim tape. Its just like that double sided foam tape but stronger. USe that on the plates and it should hold them hopefully.
/Essay