I saw one for sale on gunsamerica. I think he may come down on the price, its been up for 2 weeks. Be advised it's used.
http://www.gunsamerica.com/guns/976416595.htm
Another option is a IZH-61, it's a 5 shot springer and better constructed than a Biathlon.
http://www.baikalinc.ru/eng/prod/pguns/izh60_61/
airlune2000@yahoo.com ---This fella Rex is selling one for $75.00
Dave