We have a complete ASC/Andrew O.E.M. 4- port C-band Linear Combiner/diplexer assembly for a 7.3M ASC/Andrew Earth Station Antenna P/N 223078, NEW/NOS for $12,950 USD. This will allow for quick and trouble free user conversion of an existing 4 port Circular (CP) feed component to be removed and the O.E.M. 4 port Linear component installed as a direct fit with zero modifications required. We have this plug and play solution available on the shelf and can ship within 24 hours of receipt of P.O./payment. see photos below of 4-port LP component on shelf and 4-port CP component installed in 7.3m ESA.