Made a script myself instead and started with lettering to separate each letter from each other and then work out how much space they took together.
This is my final code,
function letter_space_me(element){
var el = $(element).text();
el = el.replace(/ /g, ' '); // REPLACE ALL WHITESPACES WITH  
$(element).html(el);
$(element).lettering();
var characters = $(element + ' span');
var number_of_chars = characters.length;
var parent_width = $(element).parent().width()
var total_width = 0;
for (var i = 0; i < characters.length; i++) {
total_width += $(characters[i]).width();
};
var spacing = (parent_width - total_width) / (number_of_chars - 1); // GET SPACING PER CHARACTERS EXCEPT FOR THE LAST CHARACTER WHICH WE DONT WANT TO GIVE AND SPACE TO.
for (var i = 0; i < characters.length; i++) {
if((characters.length - i) > 1){
$(characters[i]).css({'padding-right' : spacing + 'px'});
}
};
}