You will find some info here:
The cellular version of the LimeRFE would provide all the required filtering and driver and PA, plus LNA in the receive path and integrated duplexer. However, it seems that there is presently a long lead time on this.
As an alternative you could purchase a duplexer such as the sysmocom B3 one we have been using, then use driver and PA modules from e.g. Mini Circuits. Because of the high peak-to-average power ratio of the LTE waveform, bear in mind that you cannot drive an amplifier up to its rated CW output. A back-off of at least 6dB is typically required. It would also be wise to have a band pass filter between the LimeSDR Tx port and the amplifier chain, e.g. Mini Circuits VBF-1840+.
I’m afraid I cannot give you amplifier module part numbers at present, as we’ve not spent any time looking at this and done any testing, but it is on the to-do list. It’s going to take at least two suitably specified modules connected in series.
BTW, I’ve moved this post to the LibreCellular category so that it’s easier for others to find (and for me to reply further in future if I have more info to add).