need 3/8" box wrench ..

[KBX]

Hi, I'm new here. and have a question so ask you guys...


my kelly bass need a 3/8" box wrench. (very big size. 9.525mm)
this wrench, very hard to find. just found one from reverb, and it was sold out very long ago.

I've tried to insert a 3/8" box but it is too long and fat for truss rod hole.
if it fits truss rod tip, then I'll weld it with a stick so I can handle it.


but this way is impossible, so I'm just finding that wrench.

can you tell me where can I buy it ?
making a tool by myself is the only way?

thanks in advance.
have a nice day !!

[ed]

Does the nut look original? Maybe someone changed it. You could try and change the nut. I have never heard or seen of that big truss rod nuts. I think if you wnat to tackle it your only option is to make the tool from a socket or a wrench. Maybe you can fit some slim wall socket in there or slim down a wrench with angle grinder or something like that.