Obe - I have that very same bumper!! Hehehe, My indicators were in my parkers (orange T10) but they just weren't bright enough. I recently installed rounds ones where you have those square ones. They look ok, but still outta place. I'm now looking at installing a larger indicator globe into the parker. I think its the way to go. Like craved said, shouldn't cause any issues.
Off topic for a sec - Does ur bumper scratch on everything?