They have dropped the "Payen" reference from gasket they list for 86mm but available at 34.19 which I think is a slight reduction from the previous catalog. They have also a gasket for the 83mm engines, previously unavailable. Then there is 87-89mm gasket at
$99.99. Moss changed all the numbers, too, the new numbers superseding all the old ones. In earlier catalogs, there was only one part number for 86 through 89 mm engines. I've used that gasket on a couple of 87mm engines without incident. I do know that there were some questions about using it on 89s but I wasn't aware of any particular problems with the 87s.
Then throw BPNW, RF, and the rest into the ring. I certainly do not know what to recommend, glad I still have 2 of the old Payens.
Tom