200A is not so common for bench scopes. That's probably why you couldn't find a Testec probe. What kind of bandwidth (lower and upper) do you need? What is the rise time and duty cycle of your pulses?
I would look carefully at derating curves. For example the R&S RT-ZC02 is rated for +/- 200A or even +/- 2000A DC, or 1000A RMS AC, but if you look at the derating curve at page 40 of
this datasheet, the rated peak current at 10 kHz (sinusoidal) is only about 50A.
The Tektronix
TCP404XL is quite a bit better in both max current over frequency and bandwidth (see figure on page 55 of
the manual). But you're not going to like the price. The
Siglent CP6500 looks like it might also work but is not cheap either.
If you can live without DC and moderate bandwidth, then there are substantially cheaper options from multimeter manufacturers as industrial current clamps with BNC or banana plug output.