OK, here's the verdict (since several have asked): The best match I could find was a Tucsonix 2443-007-X5S0-102MLF 1000pF feed-thru capacitor. It's nearly identical in length and width and even has the same 1/4"-28 threads as the original part.
Here's the datasheet: http://tusonix.com/data/search/2443-007-X5S0-102M.pdf <http://tusonix.com/data/search/2443-007-X5S0-102M.pdf> It's available from Digikey as P/N 410-1039-ND: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=410-103\ 9-ND <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=410-10\ 39-ND> While you're there, if your unit has UHF connectors installed, they stock N type replacements: Amphenol Connex 172118 (N Male): <http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search\ _go&keywords=%09ACX1166-ND> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX1166\ -ND <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX116\ 6-ND> Amphenol Connex 172119 (N Female): http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX1167\ -ND <http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX116\ 7-ND> James K7ICU
