Only fairly weak channellers would really need personal angreal, and it sounds like having one was a sign of weakness as most of them are disguised to pass unnoticed as brooches or rings and such, or decorative items you could keep on display and pick up if you need them at home, or carry in a purse. Among the Forsaken, flaunting an angreal is probably the same as admitting you're in fear of the others. The Chosen even mocked (privately or not) those who sought to acquire the big stuff like Callandor. They all wish they had stuff like this, but they won't admit it to the others.

The AOL seemed to favour cooperative efforts (mixed gender ones incl.) over the use of angreal. There's one obvious reason for this: the OP is very addictive. Using angreal regularly isn't a good thing. Another reason was probably that there was no lack of Aes Sedai to join circles back then.

The more powerful stuff, that your average AS never needs except on duty for his or her local Hall, were probably in storage at those local Halls, with even more powerful stuff in the keeping of the Guild's central administration, or at facilities like research centers, factories etc.

As for the Forsaken not coming to SG with a whole arsenal, it seems to me the answer is pretty obvious. They probably all had a collection in a hidden place somewhere, but RJ described the DO as the ultimate paranoid control freak... He totally forbids the use of the OP near the Pit of Doom, killing anyone touching the Source without questions asked... You'd have to be a complete moron to go there with anything ressembling a OP object, especially anything like a OP magnifier...