+/- 60V Sawtooth/Triangle/Sine Wave
The current for such a probe seems to be in the low mA at most. I'll assume that you have a suitable function generator that you could just transform up perhaps 5:1. 

A good quality 24V:120V mains frequency transformer may do the trick, or you could wind one on a pot core or ferrite or toroid core (perhaps salvaged out of a SMPS). 

If the function generator can supply 8.5V RMS into 50 Ohms, that would be the equivalent of +/-60V peak into 1250 (\$ 50\cdot 5^2\$) ohms or 34mA RMS. 

You will likely get some rounding of the triangle wave with a mains transformer, especially at 1kHz, since the first harmonic is at 3kHz, but perhaps that doesn't matter or perhaps you could do your tests at a lower frequency. 

If not, the ferrite-core transformer should do the trick. If your function generator can't supply the required current, as Brian Drummond commented, an audio amplifier would make up the difference easily, even without a transformer if it's a high power one.