Try to Follow the historyhttp://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=7324http://www.fujitsu-ten.co.jp/english/company/history/index.html
I googled ----> Fujitsu vhf radio
Came up with lots of links some of those might just have a valid link to a home office or page. I have seen them for sale on ebay before just hope you can find a link.
don't forget to check your land mobile radio shops, who knows you may get lucky.
73, Tom Kb3hg