The ornamental design for a simulated rockfountainrainwatercollector, as shown and described.
FIG. 1 is an isometric view of the simulated rock fountain rainwater collector;
FIG. 2 is an elevation view of a first side thereof;
FIG. 3 is a front view thereof;
FIG. 4 is an elevation view of a second side thereof; and,
FIG. 5 is a top view thereof.
The broken lines showing of environment are for illustrative purposes only and form no part of the claimed design.
Views of the bottom side and the back side of the simulated rock fountain rainwater collector have been omitted because such sides are flat and devoid of surface ornamentation.