These post baccalaureate programs are fully funded (they provide a stipend)
https://bcs.mit.edu/postbac1 (MIT)
https://www.cshl.edu/education/prep/ (Cold Spring Harbor Laboratory)
https://gradstudies.musc.edu/programs/prep (Medical University of South Carolina)
https://research.ninds.nih.gov/employment-training/training-programs-ninds/postbaccalaureate-program (National Institute of Neurological Disorders and Stroke- NINDS)
https://mpfi.org/training/postbacs/#program-details-and-requirements (Max Planck Florida Institute for Neuroscience)
https://alleninstitute.org/careers/internships-and-postbac/#interns-postbac-listing (Allen Brain Insititute)