[Amps] Porcelain Insulators

[Bob Maser]

I am in need of 2 porcelain insulators to mount a 4" diameter, 10 turns 
inductor.  The coil is made out of 1/4" copper tubing.  They need to be ± 1" 
high and wide enough to support the coil.  The ones I am looking for have 
tapped holes at both ends.  Round or square, no matter.  Anybody have 
something I could use?  Please let me know what you have and the price.

Thanks,
Bob Maser
W6TR