Hello,
New to the forum, so i hope i'm posting this in the right place.
Is there a way to manipulate the sounds of the English language in a way to spell letters the way they're called without using them?
The hardest i can think of off the top of my head would be letters like B, N, M, etc.
While Letters like A, C, E, etc are fairly easy to write in this manner.

All I have to add is that you can manipulate sounds, but sounds cannot spell letters. Words are spelled with letters (in some alphabet: there are many alphabets); words typically have some associated sound. Individual letters are self-spelling, for example b is spelled "b", x is spelled "x". In English, k has a name which is pronounced [kɛɪ], and the name of the same letter in Norwegian is pronounced [ko]. You could manipulate letters according to the rules of English spelling and spell the name of k as "kay" or "cay", likewise in Norwegian you could spell the name of the letter "kå". My point is that sounds, letters, names and spelling are different things. If I was forced to spell the name of the letter "b" without using "b", I would write it as "бe", maybe "βe" or "ᛒe" (Fuᚦark is usually considered a different alphabet), and hope that people could figure it out.