@amg56, finding original Micro R-15 feet will be very difficult, but as an alternative I can recommend www.micro-Seiki.nl. They can supply exact stainless steel replicas for a reasonable price and they have even designed accompanying (non original) spiked dishes to go underneath. A great package that works very well. I should add that my RX-1500 is placed on a wall mounted support, so footfalls and other floorborn resonances cannot interfere with mass loading the table.
My BL-91 still has the original aluminum plateau (although it does have a Puresound Tenuto gunmetal mat on top), but the source mentioned above can also supply exact replicas of the RT-2000 plateau in either brass or stainless steel (not yet gunmetal, as this apparently is not currently available in large enough chunks suitable for CNC machining). So that is an upgrade path I still aim to take.
My BL-91 still has the original aluminum plateau (although it does have a Puresound Tenuto gunmetal mat on top), but the source mentioned above can also supply exact replicas of the RT-2000 plateau in either brass or stainless steel (not yet gunmetal, as this apparently is not currently available in large enough chunks suitable for CNC machining). So that is an upgrade path I still aim to take.