Borg Warner 55 (the gearbox)
244 (the car) B21E (the engine, 2.1 litre), guessing 1979 model.
Converter deal - probably the torque converter seal. Big job as the gearbox needs to come out.
Rear main - Rear main engine oil seal, the one at the back of the crankshaft. Not uncommon. Gearbox out for this one too.
Something converter bush. Not sure.
Filter kit - transmission oil filter kit. Comes with a pan gasket and a metal gauze filter.
Speedo o-ring - the small oring where the speedo cable joins the back of the gearbox. Not difficult.
Find a local Volvo guy, some Queenslanders here will point you to one. Otherwise iPd (www.ipdusa.com), Skandix (www.skandix.de) or FCP (not sure on URL, I do not often use them).
I would check the flame trap too, search for information on it. Always the first thing to do when oil starts coming out of the engine when it should not.