i ve scoured tinternet but there only seem’s to be 515 And upward in terms of models.

and help please..

Pretty sure M515/525 will fit just as well. They’re the square-ish shaped pads with one central tab for the retaining bolt / split pin, aren’t they?

Get a pair from Discobrakes and see if they fit. Won’t be much more than a fiver.

http://www.discobrakes.com/?s=0&t=0&c=14

Std deore type pad

link http://www.evanscycles.com/search?query=bo1s&x=0&y=0

other pads are available 😉

eg superstar pad type s2

Thought 505 was just the number for the lever but may be wrong
Just take the old pad out and. Match it up

infact drop me your address to the email in my profile, i have some kevlar ones that are new (not in packaging though) knocking around doing nothing

link to instructions from shimano

http://techdocs.shimano.com/media/techdocs/content/cycle/SI/SI_8V40A/SI-8V40A-001-00-ENG_v1_m56577569830696758.pdf

Great many thanks.