For my 6cm transverter i bought a 10W DL2AM PA years ago. Because it needs about 1W drive i combine it with the WLAN PA from here
The complete chain now has about 39dB gain and a P1dB of about 40dBm. So its working fine.
6cm PA chain output power
The current consumption for the both PA separately (orange driver current in mA, blue PA current in A).
6cm PA current consumption