WTB Nauticam 8.5" Acrylic dome port and Extension ring 20 with lock

Hi All, 

Looking for a used Nauticam 8.5" acrylic port (18802) without noticeable scuffs or scratches on the port as well as the extension ring 20 (21120) with lock. Zero concern about cosmetic blemishes on the shade/port extension provided it doesn't affect functionality. If you have either/both of these items send me a DM with your price + shipping to the US. 

Thanks!

Shots of my 8 1/2" dome. It's in pretty good condition. No major blemishes. Apologies for posting here but I couldn't work out how to post from a URL and didn't have the option of just dragging, like here!