Replacement radome for 450d

We have several 450d radios (c054045c013b) that have broken/cracked radomes. Does anyone know of a possible replacement radome for these radios? I would assume that since the radome includes a concentrator, the radio will not perform correctly without it. TIA!

I believe the 450d has been EOL’d… next best replacement would be the 450b high gain, and I believe the radome part number is N000900L021A.

I was afraid the answer would be along those lines. Just trying to not throw working equipment away because of a broken piece of plastic. Thank you!