Bridge bushings

Jazzthat

So the plan was to sand the body down to bare wood and start building it from scratch with either new or used parts I have in the drawer .
After removing bridge ( tune-o-matic ) and tail piece , I have realised , that bushings for both are 12.5mm ( I guess it is meant to be 1/2" ? ) .
I wanted to buy a Gotoh bridge set ( ad in classifieds ) , but going by technical drawing , the bridge and tail piece have 11mm bushings .

 Do I buy separate bushings , that will fit the existing holes ?  If I do , will a Gotoh set be compatible with them  ?

The other thing I was considering , was to get different tune-o-matic set  , that would fit the holes . 
I have looked online , but  I can't seem to find any .

SteveRobinson

Can't you use the existing anchors?

What is the thread on the old and new hardware?

Jazzthat

SteveRobinson said:

Can't you use the existing anchors?

What is the thread on the old and new hardware?

I have double checked threads just now . They are imperial . 
 I am going all gold hardware , so existing hardware is going to bin .
Tbh everything on this guitar ( 1977) seems of questionable quality. 

Edit 

I haven't bought a bridge yet so all options are on the table .