Stillpoints Ultra SS adapter needed, help...


I just purchased 8 of the Stillpoints Ultra SS for my speakers.
My speakers are the Eggleston Works Andra II. They use a 3/8"-16 thread and the Stillpoints use a 1/4"-20 thread. Stillpoints can provide an adapter but only up to 5/8" long on the 3/8" side (speaker side) and the Andra II's looks to need about 1 1/2" long.

Do any of you know where I can purchase such an adapter or even what its called so I could search the internet?
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If you have female thread on the speakers and on the Stillpoints, you need a step stud. You may find what you need at McMaster-Carr or Grainger.

Another possibility would be a threaded insert with 3/8-16 external and 1/4-20 internal threads. Then you could cut whatever length of 1/4-20 rod that you need.

If you can't find what you need, a machinist could make an appropriate length step stud from 3/8-16 threaded rod.
Minkwelder, thank you so much for your response. I am a little disappointed in Stillpoints in their help in this matter; I mean, their products are not exactly cheap. Stillpoints stated that it would take months and a very high price to supply what I need.

However, I think I did find just the right company to make this adapter. All of us Audiogonner's should tuck this contact into a safe place for future reference.
The name of the company is EVO Industries 1-800-386-4637 ask for Brian. They have threaded adapters and will make exactly what I need quickly for a very reasonable price.
I hope to get them next week.
Once I recieve them I will post my impressions.