You could use cheap fake leather for the scales, or those thick, plastic-y table cloths or placemats with a white underside and a coloured upside.
Both are fairly thick, which makes the scales behave like actual scales (standing out stiffly and keeping their shape while you move) and are available in just about any colour imaginable.
Punch tiny holes in the straight end of the scale and sew them to a basic suit.
Load and loads of work but you can put in any pattern or marks you want and it will look far more real than any printed fabric could.