Try your local welding supply store they will have 3' brass rod for brazing.
Usually in standard diameters like 062, 078 etc. Maybe they could work for you.
Especially considering that they sell it for like 3 bucks a pound instead of 3 bucks a rod
Thanks to all who replied. I have bought from Special Shapes before but they have discontinued the sizes I need. I am going to use the wire for truss rods, handrails and piping on scratch built and bashed 1:20.3 equipment. I think I will try my local welding supply.
I know the latest PNG kits are using welding rod for the truss rods and they work very well. I think you can get by with shorter lengths for grab irons and such. I've been using 1 mm brass rod for grabs.
A guy I know makes his own .055 by getting a spool of 1/16" soft brass wire and straightening it (and work-hardening it). He connects one end to a pole and the other end to the bumper of his car. He lets the car roll gently away from the post until the wire goes "twang", at which point it is (1) very straight, (2) very hard and (3) somewhat less than .0625" (closer to .055"). You can buy .0625" (16 gauge) brass wire at almost any craft supplier.