Based on the existing answers, it appears that Kevin's family is working on setting up a Tez address to accept donations. It is unclear if they have access to Kevin's Tez addresses, but they have been in contact with his wife. If anyone has any further information or can provide assistance in setting up a Tez address for donations, it would be greatly appreciated.
The gofundme above is from his wife, Kevin has been in contact with her afaiu, not sure if there is a tez address for donations or if they have access to his addresses