Marek SP4ELF and I have built some 90 degree hybrid coupler moules, which can be used to combine 2 amplifiers or to generate circular polarization with 2 linear feeds. The couplers are specified to handle 100W CW.
Enclosed is a brief description with some measurement results.
If someone is interested I can provide the bare SMD couplers or the assembled modules with the coupler mounted on a small PCB and built in a milled aluminium encasing with 4 female SMA connectrors.
If you are interested then please let me know.