Replacement transistor for stereo receiver
Since you've blown the originals 3 times, it seems like a chancy proposition to keep on using the original devices, but you can certainly do it. Go search on eBay - there are several offers.

Otherwise, get the recommended replacement.

And, if you haven't done this sort of thing much, you'll need, in addition to a soldering iron and some solder, some solder wick to soak up the remnant solder after you remove the transistors.