Looking for aftermarket 1/125 gun barrels.

bondoman

Here's an article that I found, well, entertaining...

http://www.steelnavy.com/STRUCT.HTM

Yeah, that's part of Jeff Herne's construction article on the Lindberg kit titled "Trial by Ordeal".

http://www.steelnavy.com/BDFletcher.htm

The title gives you an idea of what may be in store for you should you attempt to correct the Lindberg Blue Devil

Here's an article that I found, well, entertaining...

http://www.steelnavy.com/STRUCT.HTM

There's all-in-one-box, complete and pretty accurate (compared) set of parts labeled "Fletcher Class" in 1/144 by Revell, but that wouldn't be as fun.

No response since you posted so you may have a pretty good idea that turned barrels for the Lindberg Blue Devil don't exist.

However ...

Dreadnought Models used to make a set of resin replacement 5-inch gunhouses and a MK37 director.

I don't know if they are still in business.   Contact them and check availability

http://dreadnoughts.theshoppe.com/products.htm 

Tom's Modelworks makes a PE set in 1:125 for the Lindberg kit.   Parts may also be used on the minesweeper

http://www.tomsmodelworks.com/catalog/index.php

The secondary & tertiary guns are more problematical.   About your only game in town is HR Products white metal.   The mold is old and worn and their products are VERY rough.   Availability is also spotty.   You may be better off scratchbuilding your own