Many people have their stores that they think of when they think of kink gear – Mr S, Stockroom, etc, but you really should check out Amazon for some of your needs.
I was looking for a cattle prod and found this one, and then I looked down at the “Customers who bought this also bought…” section and I see 2 books called “Two Knotty Boys Show You the Ropes”. Yes, the kinksters love their Amazon.
You can actually find a good variety of things on there – dildos, pumps, jockstraps, and more. Check it out and let me know if you find anything particularly good.