A good cap source with reasonable prices is
http://justradios.com/ .
Remember, you can go somewhat higher in capacitance and voltage, so, for instance, if someone doesn't have 20mfd/150v, you can use 22mfd/160v.
This model of TV is not a rare treasure, so I doubt anyone would shed tears if you install new caps whatever way is convenient, rather than restuff old cans. I restuff cans for a Veddy Veddy Special item, or if there absolutely isn't enough room for the new caps underneath. For a common, everyday set, who cares?
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html