failed my WOF a week or so ago.. so now im look for a couple parts (wrecking/wrecker in your area) and answers

need a replacement right-side headlight lens for a 94 surf.. got a couple numbers on it.. 35-47
also failed as "left hand idler arm worn".. im hoping it's something easy like a bushing etc.. can anyone shed some light on the likely problem? i dont even know what an idler arm is

thanx in advance for any help on this.. have a good weekend