Where cani i find Senokot children's (oral)

my 3 year-old's pediatrician suggested Children's Senokot (oral) for persistant constipation. i have been unable to find any in my area. i called acme pharmacy, tops pharmacy, raley drug stores, cvs, rite aid, walgreens, walmart, marc's, giant eagle pharmacy, and drug mart. i have tried other products such as miralax and lactalose. either the side effects were to harsh or i can't get her to take it. please let me know of anywhere in my area that carries this product. i would be forever greatful.

p.s.

please do not send me advertisments or spam. thank you.