High Frequency Oscillator
To go from 100MHz to 2GHz, you are not so much 'increasing the frequency' as 'going to a new frequency band'.

There are plenty of components available for this range, though they tend to be surface mount, and in small packages. While doing design in the 3GHz ballpark, we routinely used 0603 components, though mainly moved to 0402 with the occasional 0201 to do 6GHz. You need either young eyes, very strong reading glasses, or an assembly microscope to work on those.

'Generating oscillation'. That sounds like a VCO, try using that and 2GHz in your search terms. It depends how much you want to make, and what to buy. Look at MiniCircuits for VCOs and amplifiers. Look at Analog Devices for whole synthesisers that you can program over SPI. But going those ways rather defeats the object of mucking about with small components and BFR93s.