AMTI resin do a full resin kit of the rubber duck truck with the correct airfillter . But thats very expensive ! Here is a pic of the fillter on my duck truck the fillter is from an Italiari western star with the correct bands and pipes heated to fit .You are correct the hight is different and the bands are in different places on the can
You may have to alter the hood slightly for the pipes to fit snuggly if you need any more help just ask somone will be able to help you