308GTSi timing gear trouble

Dear all, please advice me.
I was planning to change the timing belt at the garage and found that the timing gear has a slight move from the shaft.
It turns 5mm on each side of the rolling direction. And also 1~2mm front or backward.
The nuts at the center is tight enough and the shaft itself does not move to wrong direction.
The decition of the mechanic is that hole of the gear itself became large and because of that, it moves.
Is anybody had this kind of trouble and also if anybody has spare gears even 2hand, I would like to buy. As long as this gear is no longer manufactured.

I am sure that this post is written with bad English, and exprenation and the spells are not good or enough, but if anybody understood my situation, please advice to me.
Thank you very much

 

Dear Malcolm,
Thank you for the information.
I am sorry for the poor exprenation.
What I am looking for is No28.
I believe that this is no longer manufacture, aren't they?
If you have the stock for '80 308GTSi, please let me know.
Thank you very much.

 

Thank you for the reply.
yes, I am checking this topic everyday.
The situation is similar to me.
But as I am not the one to touch the motor, my mechanic told me that the shaft itself did not move by hand and because of that he says that the bealing should be okay.
But anyway, I will ask him to let me touch the shaft myself and with that, I will think about changing bealings.
Thank you.

 

Wow, great information!!
I will talk with the guy tomorrow(it's 3am already here in Japan and I am just back to home, hehehe)

 

By the way, is it possible to change the bealing with the motor on the car?
What do I need to change them?(any gaskets?)
Is there any special tools to loosen the nuts of the pulley?
Sorry for more questions but let me know.
Thank you

 

Dear all,
My trouble solved.
Please see the attached photo.
The knock pin(Key pin) for lower pulley of the timing belt slimed.
As my opinion, previous owner changed the belt but did not tighten the nuts of the pulley correctly and that cause loosen pulley and the move of the pulley slimed the pin, I believe.

Anyway, thank you for all and your advice surely helped me.
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