From what I've been told, Part has been around for a little while, doing 1/35th and 1/72nd scale armour (and those things with wings
).
Quick search of the net produced a UK distributer as PDI Model Supplies
Also found this site:
http://www.airconnection.on.ca/airconnection_part_ALL.htm
It lists only 23 of the 1/35th scale sets available (The C7P alone has 6 sets available that I know of) but will give you an idea.
This link is for those winged things, but it has a picture of what the Part PE looks like. It is a sheet to build a vickers machine gun for a WW1 bbbb.... bbbii... biplane (phew, got it out)
http://www.internetmodeler.com/2002/april/new-releases/PE_PART-aircraft.htm
Happy Modelling
Peter