The Right Valve Covers

I recently installed a set of [ame="http://www.amazon.com/gp/product/B0046ZJAV0/ref=oh_details_o09_s00_i00?ie=UTF8&psc=1"]Comp Cams[/ame] roller rocker arms. I thought clearance would be an issue, so I doubled up the gaskets, and gently tapped the baffles outward. Due to a moving situation, I had to drive the car about 300 miles.

The extra clearance wasn't enough, and now my valve covers are cracked, leaking, and the rocker arms are still hitting them. (At least I hope that's what the tapping is) They are (were?) stock valve covers pulled from a 318 and stuck on my 340.


I've looked for tall valve covers. So far I've only found two, neither of which look like they will accommodate the oil filler, breather, and PCV valve.
Mr. Gasket
Edelbrock

I can't seem to find any valve cover spacers that might allow me to use normal height covers.

Any suggestions? Has anyone had success solving this issue before?