A breakdown of Polish armour at the outbreak of war can be found here: http://derela.republika.pl/form.htm
Most of the equipment was locally made based upon improvements to British designs, but there was also a mix of French and British equpment.
For an in depth look at some of the hardware, see this Freeper Foxhole posting: The FReeper Foxhole's TreadHead Tuesday - The 7TP/7-Tonowy Polski Light Tank - June 1st, 2004
http://www.freerepublic.com/focus/f-vetscor/1145464/posts
"The German army was so impressed with this design they incorporated as many 7TP tanks as possible into their service."