I have looked all over the place, does anyone make tube adaptors for a 1.75" ID tube? I can't find them anywhere, I can find 1.5", 2", etc. Or 1.75" OD is everywhere, but not 1.75" ID. I would like to run 1.0"-14 thread, or 1.25"-12 would work too. Any help/links would be great. Thanks.