Six pack air filter, or close, for custom air cleaner?

Hey again! I'm wrapping up my 440 custom mechanical six pack. I will be fabricating an air cleaner housing. I'm looking for a filter that's really available to model my air cleaner housing. I'm not spending 150 bucks for an air filter. Any suggestions? TIA

http://powerplayhemi.com/air_cleaner_assemblies/3x2_air_cleaner_kit.html

I made my own base and lid whit a Ford pre 70 airfilter element for my BG six pack carbs !

K & N E3840 filter
https://www.summitracing.com/parts/knn-e-3840