this is the list of all items that should be possible to ever have in a shopping plinth, noting it also contains the “cheat” items normally impossible to get (you may want to just ignore those…), it is 1112 items, not 1114 (I took out a couple items that are technically in-game, but are just dev experiments and not actually attainable).
— edit: looks like some of these are not quite correct, eg ive listed the LED_1,2,3 etc blocks which you cant get in your inventory, so ignore those too, same for FRIEZE_1,2,3 variations of marble. The variations of seam blocks are fine though as those are seperate blocks you can have in your inventory.