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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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.
Davehrab, Thanks I have looked at those. That item would work if it was about 1 1/2" long to reach the outside of the speaker.The problem is that my speakers have a very deep recessed bolt hole.

I replaced the original spikes that came on my Andra II's with Audio Points and even with those, Audio Points provided a 3/8-16 that is 1 1/2"long threaded stem to reach the tightner that is inside the speaker.
I'll try to take a picture and place it on my system page tonight.
Looking at your pictures and being unfamiliar with the Stillpoints. I am curious if the stud can be removed from the Stillpoints? If so the I would remove them and drill and tap the new holes to accept the 3/8" thread you need.
I think and adapters are going to eventual force the 1/4" stud to fail. Just my immediate impression upon looking at the pictures you posted.