Since what you are looking for are essentially just simple markers, if you don't find what you are looking for elsewhere, you can easily just draw them yourself and define them as a symbol. See page 75 of the user manaul that shows step by step how to make a basic symbol marker like this (Or page 105 of the latest published version of the Tome, if you have that)

Nicely done.

My nitpicking self can't help but notice you stuck with the default straight line bulkheads, while the original drawing uses round shapes. Did you consider trying smooth lines instead of the default straight ones to give a more rounded look?

Nice collection. It does make testing a bit harder, but at least I have something to try.

I'll see if I can find anything. Maybe there is an overlap with what @Nivenus uses. (Or maybe I am barking up the wrong tree here, but figuring out weird problems can be difficult, so anything can be worth trying)

Hi Hadrian, good to see you.

You shouldn't let atlas maps holding you back. Those are for working on when you have the time and desire (and computer that agree with you) to do so, they're not a requirement. I'd rather see people without maps, than no people at all :)

If you only want smaller symbols, that is quite easy. After starting a new map, just hit :CC2PRESETS: and change the default symbol scale to whatever you want. If you want 5 times smaller, just set it to 0.2.

Note that this just changes the default scale, not the current one, so either save, close and reopen the map as this will open it with the new defaults, or simply click a symbol, and with the symbol on your cursor click in side the map area to bring up the symbol parameters dialog and hit "set normal" and the current setting should be changed to the default.

All tools that place symbols should observe that default setting.