I've recently been looking for balls for a combo set which are:
BRIGHT - more visible for a stage performance than the typical dull red ones.
BIG - Again for visibility's sake.
THE RIGHT STRENGTH - for the chopped balls, allowing me to do pick-ups from stacks, but also detach it for reveals without denting the table...
And I found 
this site
Their goods aren't cheap, and they're based in the US, but their range is extensive and they seem to tick all the right boxes. Their chopped balls can seemingly have their strength adjusted (possibly by changing the distance of the gimmick to the surface of the ball).
I've ordered some one-and-an-eighth-inch straight and chopped balls in parakeet blue. I'll report back on them when they arrive.
Pete