There are places called foster homes and you can sign up to become one and they'll drop off children for you to take care of, from there you can harvest them for their blood.
From the same jews that brought you AIDS and Monkeypox, the cabalist association of south africa prouldly announces a new science in adressing the juvenile ichor demand brought on by the ever so popular and novelly unearthed moloch rituals, in a socially concious, low accountability margin and enviromnentally friendly manner. They call it "mosquitotech".
Heres how it works. The rabbis at mosquitotech have come to the revelation that the unassuming mosquito is the perfect covert extraction method of ritual blood while preserving possible future sacrifices! But how do the mosquitos do our bidding? Well that is the goal of mosquitotech! Currently in development is a subject generation of broodstock programmed to collect blood and return to the nearest mosquitotech base via a brand new engineered recall pheremone which is released into the air when sufficient time for blood gathering has passed. Currently mosquitotech synagogs are only in majority black places, but with funding, this startup has plans of engineering strains that can carry and selectively administer vaccines and other payloads covertly! I look foward to hearing back from you soon mr president!