Nikkor 135mm f/2 AIs disassembly?

Hi all

I have a lovely 135/2.0 AIs, one of my favorite lenses.

Recently though, probably because the focusing was very stiff and I applied more torque than usual, the focusing ring has come loose with about 1 inch left/right play. I guess it has disconnedted from the inner focusing helicoid.

I've tried sending it to Nikon for repair but they sent it back with the message "no more spare parts". I guess they wanted to change the whole focusing ring/helicoid?

So as I don't want to part with this lens, I'm now considering the possibility to disassemble it myself and find a DIY way to reconnect the focusing ring...

• Am I crazy?

• Do you know where I can find assembly/disassembly instructions? Needed tools?

• Would you know anybody who could do the job (preferably in France or Europe) for a reasonable price, because the lens is not work a fortune?

Thanks for any help

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One shot from this lens: