I have a 97 4Runner and the K & N cold air intake kit fits fine. I dont know how it compares to the deckplate mod, I bought it before I heard of this site.
I haven't had any CEL issues but I am always careful not to use too much oil. it really isnt that difficult to clean the filter twice a year. I would say 1/10 the diffficulty of an oil change.
the parts and model numbers are listed on K&Ns website along with dynos.
other solutions might be great as well, this one has worked for me.