You can ask your local stoma nurse, I find that they normally have them.

Here is some links I found on Google.

Crohn’s Colitis Ireland provide members with a “No Wait” card https://crohnscolitis.ie/support/no-wait-card/

Bladder & Bowel Community: Have a free digital download for your smartphone, so you can use it straight away. https://www.bladderandbowel.org/free-just-cant-wait-card/