I have recently purchased a Leica M3 with the hope of finding a small unobtrusive camera for candid and general street photos. This one is SN 854238 one of the last double stroke versions. The camera is beautiful and a real pleasure to work with (although I am having to get used to the smaller negative size). The problem is the Summicron f2 50mm lens that came with the camera has a lot of scratching on the front element; so much so that obtaining a sharp image is compromised. I am hoping you rangefinder folks could help steer me on what strategies I should pursue. 1. Are there reasonable alternatives for finding a replacement front element for an older lens such as this? 2. What make/model lens would you folks recommend should I replace the entire lens? I am hoping to stay within a budget of $500 - $750 per lens. I really appreciate you taking the time to consider this question.