Hello OMs,
after some OMs asked me where to get UMTS amps for 2,4GHz use after modification i can recommend the eBay member "bisonelectronics-sp2jyr".
He sells sometimes old UMTS PAs for reasonable prices. I bought one of my amps there and after modification it runs good on 2,4GHz.
So if you are searching for a PA then maybe there you can find something suitable.
vy73s DB8TF