Access to custom staff sprite?

Hi,

When trying to access the custom staff sprite for icons - I guessed and used the same base URL as the vendor logo but I always get the same picture no matter what parameters are there. Am I looking in the wrong place?

eg URLs (with UUID's removed)

https://no-cookies-cdn.servicem8.com/CustomStaffSprite?id={{ staff_uuid }}&_dc=208
https://no-cookies-cdn.servicem8.com/CustomStaffSprite?id={{ staff_uuid }}&_dc=120
https://no-cookies-cdn.servicem8.com/CustomStaffSprite?id={{ staff_uuid }}&_dc=4
https://no-cookies-cdn.servicem8.com/CustomStaffSprite?id={{ staff_uuid }}&_dc=88

All values were retrieved via the staff.json endpoint. A further issue is that the image is 32x32 but is returned centered in a 64x64 square.

Appreciate any help :)

Thanks
Joe