A few questions

[brit plumber]

Are the shock absorber drop links a standard off the shelf part? If so, does anyone know of a suitable replacement part?

And, I need a front axle drain plug which according to the parts list, is a pipe thread, square head 3/4”. Is the 3/4” the thread or the square head size?

[Monkeypirate]

The 3/4 is the pipe diameter of the plug. I don't think the shock connecting link was a standard part but i have seen them available.

[brit plumber]

So hopefully, this one should fit.

https://www.ebay.com/itm/272644999518

[Outsider]

That one should work. Especially since it has the magnet in it. Those are always helpful to keep bad things from floating around in your lube.
Steve