The way our quote system works is that it will price out absolutely everything in your design; meaning that you cannot select a few cabinets in your design to have only those be priced. The only thing that you would be able to do is copy/paste your island to a new floor plan, apply all your styles and pricing and then create your quote there.
You could make a copy of your catalog (rename the catalog and reload another copy). Then switch those items in the island to the renamed catalog. They will show up on a different page of the quote with their own subtotal, but the grand total will include all items with pricing attached. Don’t forget – you will need to assign catalog style, price level, etc in the new catalog before printing the report!