Increasing number of characters for Letter Salutations

Hi all, Does anyone know if it’s possible to increase the number of characters for the Letter Salutations? We have it set to 55 characters, which according to all the documentation is I believe the maximum, however this is not long enough for some of our constituents. We need to use formal names, long prefixes and multiple suffixes for some people. One record in particular would ideally need 93 characters or a minimum of 79 if we dropped the suffixes. Just checking if anyone has been able to increase it to higher than 55? Thanks, Alison