Best source for replacement antenna?

[jimbofish]

I find myself with a number of portable multi-band radios that are in need of new extendable whip antennas. Most are old or obscure brands that preclude ordering a replacement from the manufacturer. Naturally, they are all different and the cost of shipping from different vendors is usually more than the part.

Has anyone located a single vendor that has a good selection of replacement antenna with all the necessary specs to order an exact replacement?