Trouble with 2.5" boat seat pedestals

[snowman48047]

I have 2 16" tall posts at 2.5" diameter for seat mounting on my starcraft and the seat spiders are total junk. Where can I find new ones that will fit these posts? Everywhere I look all I can find is 2 3/8" or 2 7/8". Even on iboats...are these just tht old? I don't want to spend a fortune on new bases, posts, spiders, and seats. Do I need the 2 7/8" spiders with bushings?

 

[snowman48047]

Re: Trouble with 2.5" boat seat pedestals

Nobody has any idea on this? Were the bushings created to use with the different sizes of posts? What do I need?