First of all thank you guys, because of this thread I was able to order the parts from Sindy, and fixed my lovely d2000s.
And I wanted to share with you, how I made my own 4mm nut driver.
All stuff needed you can easily find at your home . I guess nobody can't beat the price )))
So take a tip from the conventional BIG ballpen, it would be middle part of the pen, which secures the paint in the body, heat the end of it with hair dryer, lighter, matches of magnifier and sun rays, whatever you got to make the end flexible and soft, but don't overdo. Place the nut into it and let it cool. Then take some coarse sand paper and grind it until it fits the hole. Worked just fine. To lock the nut and cup in place I used nail clear coat. Similar stuff factories use in electronic manufacturing. Hope it helps. Here are some pics of my tool
P.S. Unfortunately I cant add pictures yet, since I'm new user here, but once I can, I'll add couple pics of my invention.
Pics?.................