err, all part numbers are listed there already... Or not?
The few parts you need are:
GE6T-61-J02 AC evaporator lower half case
TC86-61-J31 AC evaporator case filter plug
CB12-61-J6X aldehyde filter
J001-50-171 license plate holder bracket (believe it or not, this part works perfectly with this setup.. more later)
metric size license plate bolt that fits the bracket
2 suitable size self tapping screws
set of finisher washers
all of those parts EXCEPT for the aldehyde filter can be purchased at any local Mazda dealer.. the filter you *must* import from Europe... however, if you are just content with a normal pollen filter, you can order GE6T-61-J6X locally and it's half the price of the aldehyde filter.... funny enough, the lower half case is not used on ANY car sold in the US... it just happens so mazda mistakenly put it in their US parts database to let everyone use it to their advantage
EDIT: at the time of writting, I omitted 3 additional parts you'll need
GA5R-61-J04 seal
GE4T-61-J05 seal
GE4T-61-J29 protector
details on post 19. Negatize also recently discovered that his evaporator unit is completely different from mine because his is a 99 model. It turns out that the filter conversion will ONLY work on 2000+ models. If you have a 99, then you'll have to upgrade to the newer (and more efficient/reliable) evaporator design. Details for that are in the FAQ. The entire evaporator unit WITH filter is orderable from ANY US dealer!