I dont know of a site that has wolf sounds. But I here them alot around here and wish I knew what the were saying. Most are just long drawn out low howls. One time I heard a short one like a yote challeng dont know if they are the same. This was during a nature call 4:00 in the morning I was armed with only a mini mag light and a roll of toilet paper. I have purchased a wolf howler from Bugling Bull Game Calls. com . No luck yet.
Cleve