I have a lenshood for the Mamiya TLR at home. I think that it is intended for the 80mm lens but, it may (or may not) suit your needs. Drop me a PM if interested. I've sold all of my TLRs and have no use for it.
The RZ67 is an SLR, so I'm not sure if a TLR hood will work. The hood I'm looking for works with the 50mm and 65mm lenses. I doubt an 80mm hood would work but then I'm no expert on Mamiya.