at digikey all you have to do is to punch in parameters of your original transistor and you'll get a variety of ones with different fittings and shapes.
In case with transistors, unlike tubes their parameters may differ to a larger tolerance.
McIntosh C28 transistor subs
My C28 needs two transistors that are on backorder from McIntosh for months now. Can't a high quality brand transistor with similar (or better) specs do the trick? I do not know the part number of the transistors in question, but my repairman wants to await the arrival of the McIntosh-supplied parts. Your input is welcomed!