It's been a while since I had an ostomy but as I recall the hospital sent me home with enough supplies to get by for a week. Once home an ET nurse would provide home visits to evaluate the stoma and recommend new appliances based on the changing shape. I don't think you should purchase any supplies in advance as you may find you don't need them or your nurse will offer you an alternative that is better for your particular case.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free