Nick, I've pasted two links I used while researching changes/replacement of the arm on my 1210MKII. Lots of really good information.
http://www.soundhifi.com/sl1200/index.htm#other
http://theartofsound.net/forum/forumdisplay.php?f=46
Good Luck
http://www.soundhifi.com/sl1200/index.htm#other
http://theartofsound.net/forum/forumdisplay.php?f=46
Good Luck