Forza Motorsport 3

I've been a long-time Xbox Live member ever since the 360 came out. I play racing games all the time. I really enjoy the Forza series, and I am getting pretty desperate to get the Forza Motorsport 3 DLC. I am aware that it is no longer on the marketplace. I really don't understand why, but I would be willing to pay for it. I hate starting a game knowing I have missing content in it. I couldn't afford it before back when the game originally came out, and I probably won't be able to afford the Xbox One for a while either. All I want to do is enjoy one of my favorite games with all of the content. I'm not sure if there are any other people out there that really care about it, but I personally prefer Forza 3 over Forza 4 for a few reasons. I never found out when the Forza 3 DLC was on sale before it was removed. I just feel like I should still be able to get the Forza 3 DLC somehow. I think it's completely ridiculous that I would have to buy the special edition (or whichever edition it is) to get the DLC, and from what I hear, even then I wouldn't have every DLC. I don't understand why it can't at least be temporarily re-added to the marketplace. That would make Microsoft customers very happy because it shows us that you care about what we want. This is my first time posting anything on the forums. I don't know if I am asking for a lot, but all I want is to be able to download and play Forza 3 with everything that was available for it. If anyone from Microsoft can help me, I would appreciate it more than you know.