And as for the rest, I really just shop with Chazzers.
Ren (oc_spirit) makes great leather leashes. I have one from her that I much prefer to my other leads, and I plan to order another one from her before long.
Northern Blackout
And I have to mention Good Kharma Tags, of course. I'll never get tags from anyone else. They're thick and durable, deeply engraved, and unique. The amount of thought and effort that goes into them, making them perfectly suited to each dog, is just incredible.
Good Kharma Tags