I know they used to do custom nose cones, but gave that up a few years back. I'd imagine that they don't do custom anything anymore. However, Nat Kinsey at Upscale CNC does. He is on here, but I can't think of his user name at the moment. [FONT="][email protected][/FONT]
Nat at Upscale CNC, Wingarcher here on the forums, he does great work. Also does rings and bulkplates. Pretty much anything. I've had him cut two sets of fins and numerous rings and plates and some were complicated cuts.
Others that may do it:
Binder Design
Madcow
Wildman
MAC Performance
+1 for both Carl and Nat. I've had numerous things done by both guys, and BOTH are top notch. Carl has a CNC laser and Nat does CNC routing. For balsa work or light ply, Carl would be my choice. Nat is my go to for thicker ply and fiberglass.