The importance of pairing depends on the circuit design.
If it is a class AB output stage and there are 2 diodes or some other bias circuit to bias the output pair (back-back emitter followers), then a) it's a bad design if it depends heavily on matching; b) if matching really is important, the diodes and power stage transistors will be thermally coupled (often diodes bolted to the transistors); c) there may be a low value (10-100 Ω typ.) adjustable resistor to compensate.
Matching also used to refer to beta and fT, but thats less important, and 'good' transistors will have plenty of beta and BW. For your case, matching probably refers to the VBE needed to bias the devices and how it matches the diodes (or they could also have been transistors). Modern transistors are all quite identical, so searching for 'matched' devices is fruitless. You'd be better off combining devices from different manufacturers