This mount is attachable to a stock/upgraded Ender 3.
It uses the screws holding the z-axis bolt to attach the mount, will need a filament sensor and screws for the filament sensor to attach.
https://www.aliexpress.us/item/3256801163204720.html?spm=a2g0o.productlist.main.9.421920dceIJu0l&algo_pvid=d88a743a-7626-48eb-b7cc-7426d5db0da4&aem_p4p_detail=202301202303444403282762645750010927855&algo_exp_id=d88a743a-7626-48eb-b7cc-7426d5db0da4-4&pdp_ext_f=%7B%22sku_id%22%3A%2212000027101894844%22%7D&pdp_npi=2%40dis%21USD%213.48%211.15%21%21%21%21%21%40211bf0a916742846248315456d0750%2112000027101894844%21sea&curPageLogUid=ArmbmR8J9UhG&ad_pvid=202301202303444403282762645750010927855_1&ad_pvid=202301202303444403282762645750010927855_1
The author marked this model as their own original creation.