Post 'em up…
AP? Client side? Budget?
12-18 dBi Yagi for 900Mhz for client. ( i will make for you 
)
For base station use kathrein VPol Panel 870–960 105° 13dBi 3°–15°T
AP mainly.. looking for sectorized antennas… budget? what budget? 
Radiowaves doesn’t seem to have any… looking for a quality antenna.
For sectors, Til-Tek and MTI are your best bet.