Transmission access covers (55-59)

[chevyrestoguy]

I am working on my firewall and trans tunnel on my '55, and I have come to a point where I need to either build another trans access cover or modify my stock one. I used a Camaro subframe and placed it higher in relation to the stock frame, so my motor and trans sit higher than stock, thus causing the trans to stick out of the floor. I recall seeing a trans access cover for the 55-59s that had a slight hump in it (Maybe the 2.5 ton models?) to clear the stock transmission. Is this true or was it an optical illusion? I would appreciate any input on this, and if anybody has one, I would be either willing to buy it or trade my rust-free, perfect stock pan for it.
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TOYOTA W TRANSMISSION SPECIFICATIONS