Thanks all. Thanks Robert. I ordered 3 pairs from Microtools.
I cant believe that in Europe they are 32 euro and in the US 15 euro! I also got 2 more pairs for $15 !!!!!
I haven't decided if it's to be black or chrome lugs so I ordered both.
Original BP M4's had chrome lugs but the black do look nicer to me.
Did you order "replacement" lugs or new ones. The Normal lug on a M has a 3 mm fitting - but when you remove the old ones you need to use a 4 mm fitting as the "hole" in the shell gets enlarged when you pull the old ones off.
I have ordered both the standard and the larger. I spoke to Malcolm Taylor today who very kindly gave me a few tips on removal.
I intend to grind the old one off and knock the spigot through thereby leaving hopefully a standard size hole. That's my theory!!!