Sale or trade: Nauticam flip diopter holder

I recently changed ports and now need a different flip diopter holder. I am open to sale or trade.

I have the holder for M77 ports, part # 25103, for sale ($200 including shipping in the US) or trade:

https://www.nauticam.com/collections/accessories-for-ports/products/m67-flip-diopter-holder-for-m77-macro-ports

I need the holder for M67 ports, part # 25101, that I would like to acquire by trade or purchase:

https://www.nauticam.com/products/m67-flip-diopter-holder-for-m67-macro-ports

Can anyone help me out?

I mistakenly bought the M77 port holder instead of an M67.

It will work on a 67mm port thread if you I use a step-up adapter. They are about $10 on eBay, etc.

One is Goja 67-77 MM Step Up Adapter.

https://m.ebay.com/itm/Goja-67-77MM-Step-Up-Adapter-Ring-67MM-Lens-to-77MM-Accessory-Premium-NEW-/272792395073

Thanks, but I need to go the other way. It's not a thread issue, the flip holder I have is too big for the port so cannot notch into place.

time to refresh - any interest?