That's a tough one.
I have a similar probe (got it from SVC). I had a chance to crack it open, but the circuitry was very similar to a cheap wrist watch (chip encapsulated in a black "wax", with a small metallic cylinder on the side).
I suppose that you could swap out the crystal (metal can) for something with a higher frequency, but the results might be unpredictable. The circuit might not be able to handle the higher clock, the bit rate might be thrown off, ... Also, the probe may not be spec'ed for the faster response time.
Worth a shot. I'd try it, if I had time.
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