Owies!Miss Troy Orleans also has informed me that Dungeon Delights has recently started producing a device very similar to the KTB called "SxySadist Toothed Ring". It comes in a few sizes and variations to the spike length & styles.
I have heard nothing but great things about the customer service of Dungeon Delights so far, and it's obvious that they care about the product, which is named after Mistress Suzanne "SxySadist". You can read a bit more about her and the design of this device on her - blog.
Another style that is available is the Extreme Restraints "Spiked Head Ring". Although the spikes are adjustable on it, it unfortunately only comes in one size, which I think is a major bit of short-sightedness. Though I suspect if they sell well, more options would appear.
For those who are more curious than others, a good friend from the Hang, "Proud2Serve" has decided, since his D/s status has changed, to sell both of his 1.5" diameter size rings (both styles: long & short spikes).
Update: He's sold one, the other one is listed at fetishauctioneer.com, with an opening bid of $9.99
FYI, Dungeon Delights have a Halloween discount of 15% on everything - enter the code "Oct31" at check out for a 15% discount.
And for the women out there who still want to have their fun while denying their man, and perhaps tormenting him at the same time. Extreme Restraints now sells a vacu-lock style strapon harness for men, with or without an optional butt plug.