Orange Drops are nice but they are designed for Printed Circuit board mounting and are difficult to use in most old TV's.
I use the yellow tubulars sold by AES
http://www.tubesandmore.com/
or Bob's Antique Radios.
http://www.radioantiques.com/
They are smaller than the originals even at higher voltages, I use the 630 volt ones for everything 600v or less.
The leads are soft and easily manipulated into tight places, (unlike Orange Drops).
Cheap electrolytics are available in most voltages from Mouser.
http://www.mouser.com
Have them send you a catalog then you can place the order online easily.