Vicki,
I posted this link when you put this question on another thread, so pardon the repeat of information if you've checked it out already.
www.webercarbsdirect.com/idf_air_filters
These are guaze elements and cost apprx $32.00 a pair.
I haven't seen any paper elements for these air filter (And as soon as I post this, someone will post a link to paper elements).
A good machine shop should be able to measure the curvature of your rear deck and bend a stainless steel exhaust blast plate for you.
TMc