Do as T-way suggest. Grind the screws off the HEADS & apply a small drop of silacon or hot glue to hold the head on your decal [will look like your decal is SCREWED ON].
Most porcelain signs can be bent slightly 1 time.
Lay edges on 2 2x4's, then cover with 1/4 plywood, STEP on it. Should give you just enough bend to attach to a round pump.
db