When was the last fuel filter change? When mine gets dirty, it seems the IP and injectors sound off even more at around 1200-1500 RPM. A new filter and a quart bottle of PowerService Silver to a tank of fuel clears it up outright.
I did eight in my CC panel by "unsoldering" them and soldering the replacements back in.
Once the panel is apart, it's a simple process to replace them.
I replaced mine (lamps). All eight of them. Removed the wheel, the button assy's, opened them up, unsoldered the old, soldered in the new, put it all back together in about 90 minutes.
Dealer wanted $48/ea for the controls. My bulbs were $1.79/pair.