I need a screw

[DaveReading]

All the dome/button headed Allen screws I find online have stupidly shallow heads and are easy to round off.
The ones I need really are like the one on the right, but I can't seem to source them. This one was fitted to my Dawes Vantage when I bought it.
Can anyone point me in the right direction please? I really hate the standard socket type bolts.

View attachment 466651

I tried in vain to source both of those a few months ago, to match the ones that my tourer came with.

Ended up buying stainless not-very-close matches at Screwfix.

 

[I like Skol]

www.pro-bolt.com/stainless/stainless-steel-bolts-tapered-socket-cap.html?length=394%2C397%2C402&thread_washer_dia=571

 

[DaveReading]

www.pro-bolt.com/stainless/stainless-steel-bolts-tapered-socket-cap.html?length=394%2C397%2C402&thread_washer_dia=571

I'd worry about leaving my bike unattended, with bolts that cost upwards of £2 apiece.

 

[Harry1]

What about these? https://www.accu.co.uk/en/socket-button-screws/8101-SSB-M3-6-A2

 

[Vantage]

Those ones can be found everywhere.
I gave up looking, bit the bullet and settled for socket cap bolts.