so for playing my vinyls i've got a really old, 80s style all in one type thing that has the record player on the top and two tape decks and all that. well the stylus is knacked. i've taken it out and gone down to richer sounds who apparently don't even sell any stylii at all anymore. now i am searching online and there are a million different types. short of looking at the make of the stereo (which is what will PROBABLY eventually happen) is there any way i can identify what i need. are old diamond stylii fairly one size fits all??