Holy hell.
To those with useful responses, thank you. I have a calipers, access to aluminum stock, and above and beyond every machine necessary to make them. I suppose i should have been more specific, the only dimension i really needed was the distance it protrudes from the axle to be effective. I could have easily guessed, but figured i would try this route first.
I just finished machining this breather catch can:
To those deemed "dicks," maybe ask questions before jumping right to being an asshole. In the very, very short time i have been here i have supported multiple forum sponsors with hundreds of dollars worth of purchases, including a couple members on here who make their own custom accessories (Matter & redstang). I have even given away parts i no longer needed to fellow buellers for free, which i could have easily sold for cash. So in conclusion, go be a cry baby bitch elsewhere, dick.