Yes, 48. And we've got 37. Here you have the exact list:
LINK
In the table, from left to right: Type, serial number, side number, unit that got him, production date (all are unknown), delivery date, date of main service (all empty, none was serviced in US yet), date of retire (all are flying), other.
There are information about most (if not all) polish airplanes, chopters. It's only in Polish, but mostly numbers, so you should not have any problems with reading it. If you have an question - just ask.