Source for Carbon tripod post replacement

[sheepdog8404]

Looking for a source for a carbon center column for my Vortex Ridgeview tripod. It has the factory aluminum center column with a 1/4-20” post. I’m looking for a .70”/ 17.9mm diameter carbon center column to replace it with. If there’s one that has a 3/8-16” stud it would be even better!