I possess a copy of 'Nowhere to hide' & if you want a copy I suggest you contact the author Paul Lawrence direct as he self-pubishes. I will PM you with his email address.
The production records in the book show that only two RP4's were exported to the USA (none to Canada) when new. Chassis RP4/11, the last example built in 1970, was sold to Eric Hauser. Chassis RP4A/2, from 1971, was sold to Bob Smith.
The semi-monocoque chassis was made from 16 & 18-gauge mild steel, clad in NS4 aluminium panels.
Hope that helps!
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