Any update on what keys we need to get for the hypothetical Input Club Symbolics keyboard? seems like getting a layout similar to the original symbolics keyboard would require a combination of the different modifier sets currently available
Why you want an "update" from OP for a product unrelated to this run?
You can see from the photos of Kono Store that the original Symbolics Keyboards have a 9u space bar and many 2u keycaps on various rows - which are all lacking in this run.
My suggestion is to pray that their project at preliminary stage will succeed eventually and also will come with their own keycaps.
Otherwise, your best bet is to get some of the leftover of Round4/5/6 by 7Bit over at DT, or join his future Rounds, i.e. Round 7 b and later. Where he may make these "Hyper7 kits".