How to aquire my "Silent Key" dad's old call

I see by this site, that my father's call is available. (W0NHP)
Can someone here that knows, give me some guidance on how
I can change over to his old call? I've had my call for about 30
years if that matters.

Thanks, and 73
de: KA0YUA

ps: This is a digitized image of a 35mm slide I took in 1958 when
I was seven years old.

 

http://www.arrl.org/applying-for-a-vanity-call

 

https://www.fcc.gov/wireless/bureau...-radio-service/amateur-vanity-request-types-2

RESPECTFULLY,

 

Another source for assistance is the W5YI GROUP. They may be able to assist you for a small fee. I acquired my grandfather's callsign over 20 years ago. Just a suggestion DE Matt W6YNS

 

RESPECTFULLY,