Any question answered...

if you can't find any diamant decals (try here http://www.hlloydcycles.com/ and ebay) then get some high res photos of the ones you want replicating (they don't look too complex), and anyone semi-competent in illustrator will be able to make an eps of them which you'll be able to get produced. bear in mind if you use armourtex (or any other powder coaters) then the decals will be on top of the paint, whereas if you use a traditional enameller then they'll be able to clearcoat over the top of the decals.

hope this helps.

You will also loose the chrome on the back if you powdercoat