I replaced mine with a Purolator A35432. It looks very much like the Toyota filter. You might find this thread on changing the air filter useful. Other filters that fit the TCH are:

Toyota 17801-20040
Fram CA9360
Hastings CFA1133
WIX 46673

The same air filter is used on 2002-2007 Camrys with the I4.

Personally I don't care for the fine dust that I've seen pass through the K&N air filter I once used on my truck.