Farnell is good too. But good old RadioSpares is a mainstay. Maybe contact them and see if they have any plans to get more options in.
An aside, Sir Rowland Hill invented the modern postage system in 1837.
So we have some history in how to do it.
Plus the steam engine, the jet engine, the RR Merlin, RADAR, and the railway (and television).
Edit: and of course atom bombs, rockets that work and hypersonic transport. and the key technology for the Galileo system that will fall apart without us.
The USA of course came up with the Pony Express, but doesn’t seem to have progressed much since.
Night mail (Royal Mail still has a universal service obligation i.e. I can post something here on the south coast at say 5PM and be certain it will arrive in Orkney or the Outer Hebrides the following day, for the same price as sending it a mile down the road.
I don’t even need to put a stamp on, it will get delivered though the recipient will have to pay, which is a bit cheeky.
It’s more done with planes today (one of my staff used to pilot the night mail plane to Cologne once a week, to keep up his four-engine commercial rating on the BA 146). I tagged along once, which was fun (and co-piloted for a bit, whilst he had a snooze, but don’t tell anyone).
And trains (though it’s all a bit messed up at the moment since a timetable change was introduced a few weeks ago, big-bang style, which isn’t quite working yet, wouldn’t have happened in Switzerland or Japan)
An amusing observation about the reliability of oil lamps, about nine minutes in.
All in fun,whilst we await developments and evaluations of the B models.