Check out the latest product in stock. 
One inch diameter spinners.
Spun aluminum cone with a turned backplate from 6061- T-6 alloy.  The nose piece has a 1/16" cross hole to tighten, with a 5-40 stud to fit into the supplied union nut.  These are fit together as a set.
No prop cut outs.  The assembly weighs just under a quarter of an ounce.
Price is $20 with $2 shipping

Bill
The real answer is even more esoteric...!!   The cones are 1960's vintage Rev-Up....    The difference is the nose piece.  The one inch Froom had a truncated cone with a slot while the Rev-Up had the cross hole like the larger Froom and Veco spinners.   Todd found an original NIP Rev-Up Half A spinner one inch at Toledo last year....
Later
Jim
PS -  I will try to get a hardware set available to make these useable for the Norvel motors which use a 3mm x 0.5 screw...  just enough different to be a problem!!   

Jim I will need 2 for the AP Wasp .061. I am trying to find the thread size now. Found. It needs to have a m4 thread (4x0.7MM) Can you make them?

Jim,
   I have 4 1/2 a spinners. 2 short nose and 2 needle nose. I was able to make the union nut out of stainless steel in a 4.7 mm thread and get 4.7 mm bolts to make them work. The AP Wasp needs 4.7 mm. I like the stronger crank shaft in the Wasp.

Jim,
    I just received the 2 I had you make. What can I say. Just superb. They fit the shaft of the AP Wasp exactly.
Thanks Jim

Dick

Check out the latest product in stock. 
One inch diameter spinners.
Spun aluminum cone with a turned backplate from 6061- T-6 alloy.  The nose piece has a 1/16" cross hole to tighten, with a 5-40 stud to fit into the supplied union nut.  These are fit together as a set.
No prop cut outs.  The assembly weighs just under a quarter of an ounce.
Price is $20 with $2 shipping

   Hi, James
I am building a twin 1/2 A profile DO335 that will have a pusher Cox Madilian .049 in the tail.  I need a 2" extension for the prop to extend through the tail assembly.  I don't need a lot of HP out of the back engine so I will put a easy start product jug and pistion on the back and a TD style jug and pistion on the frount. I have found a LH crank for the rear engine. Anyway 3 questions. 1)   Can this be done?  2) If yes what is the best way (through hole/long bolt or threated with studs aft and screw forward)? and 3) Can/Will you build one for me $? If you wish you can PM me. Who says 1/2 A is easy?