They are all in ASA, however there are a few different types used. Don't expect to get back the exact ones of you make an order either, they seem a bit random. Best bet is to measure them each up and source suitable replacements elsewhere.
I just used cable ties on all holes. A pair of scissors and snip, snip for next servicing, and then cheap to replace. There's just a couple of slightly fiddly holes on the front bumber.