Buy used:
- LZ series board [I know LZ-S and LZ-GH will fit for sure]
- GON NS87 [like you said harder to find now - and its alu not SS]
- Duck Orion [also hard to find but has SS plate]
- Duck Unicorn [basically Orion, but acrylic with SS plate] - even harder to find than orion LOL
-
EXE image from yuktsi - not sure if SS or aluminum plate, but definitely metal - also hard to find
Is there any reason you are limiting yourself to the A.87?