As noted there several places to find crinkle/wrinkle/crackle paint.
In case you've never used it before, let me suggest: Use a good automotive self etching primer and let dry 24 hours before the crinkle paint application. Use two coats of crinkle paint, about 10minutes apart. Finally, dry with elevated heat. Like an oven (NOT your wife's), heat lamps in a large box, etc. (Lamp light dispersed to prevent "spotting."
The use of this specialty paint takes a bit of planning for an even finish.