Yes, they're still available but it will cost you $$. As mentioned above, Rotor makes Q-rings. If you need a small ring for a triple, your options will be very limited.
http://www.rotorbikeusa.com/
A small selection of Shimano Biopace rings can also be found on Ebay.
I have some Biopace rings, but never got around to mounting them. Some people swear by oval rings, others are like 'meh'.
Some other options (Edit: just noticed than neither is selling anymore, but good info):
http://www.highpath.net/highpath/cycles/ovals/01.html
http://kingbikefit.com/why-i-am-sell...al-chainrings/
If you're handy, you can also make your own chainrings.
http://www.fleettrikes.com/giles%20p...0calulator.htm