Research universities usually have animal labs where they provide animals for their animal models.

i.e.

Stanford

https://med.stanford.edu/animalresearch/why-animal-research.html

Vanderbilt

https://www.vumc.org/vumc-acup/animal-care-and-use-program

McGill

https://www.mcgill.ca/research/research/compliance/animals/training/basiclevel/good-research-practices

Animals in NIH Research

https://grants.nih.gov/grants/policy/air/index.htm

NIH Cost Analysis and Rate Setting Manual

for Animal Research Facilities

https://grants.nih.gov/grants/policy/air/rate_setting_manual_2000.pdf