My company developed and manufactures the P&D pulley, as many of you are aware. Since its inception and subsequent installs on hundreds of cars, several alternate designs have entered the market and clarification is in order. Several websites specifically illustrate the P&D pulley, and if so, one would expect that is the pulley they use.
The P&D pulley is only distributed by BMP/Promini, who sells direct as well as to dealers.