Edit: see YellowAfterlife's reply below instead, for the correct and simpler solution.
I had a similar issue for a duospace font. The workaround I use is something like:
. ABCDEFGHIJKLMNOPQRSTUVWXYZ 1
Basically you increase kerning between the dot and every other character.
I had to do it for multiple chars, to increase by 1 or 2. In my case it looks like:
kern ()-/@[\\]°²³¹–„‹› \s!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡¢£¥§©ª«®°²³·¹º»¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖ×ØÙÚÛÜÝßàáâãäåæçèéêëìíîïñòóôõö÷øùúûüýÿıŒœŠšŸžẞ–—‘’‚“”„•…‰‹›€←↑→↓∎−★♡♥ 1
kern !',.:;`|¡·‘’‚• \s!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡¢£¥§©ª«®°²³·¹º»¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖ×ØÙÚÛÜÝßàáâãäåæçèéêëìíîïñòóôõö÷øùúûüýÿıŒœŠšŸžẞ–—‘’‚“”„•…‰‹›€←↑→↓∎−★♡♥ 2
( it includes the space character \s )