I have never heard of a RC/PE version of this paper. It is an old fashioned silver-bromide emulsion, originally intended for large format contact prints. Importantly, the paper is MUCH slower than other current papers - presumably you want an extremely long exposure, without diffraction problems due to making the pinhole smaller? In any case, the fibre-based version is all that you will find I think. It is available from Macodirect (if they have any in stock) as well as being listed on the Foma webshop.
I stand corrected. Tucked away there is indeed an RC version of the paper in 5x7" size <--link, and with a special-offer price at the moment too.
Last edited by MartinP; 10-17-2012 at 05:42 PM. Click to view previous post history.