@skyking1
I'm so sorry it didn't work out. You have done your absolute best to honor your friend by providing a home for Pinky. It was a wonderful thing to do, but you can't put your other dogs in danger. It does sound like Pinky needs to be a solo pet, unfortunately.
I know a lot about cat rescues, but nothing really about dog rescues. I googled "Jack Russell rescue, Puget Sound" and the organization in this link popped up. Perhaps they can help you place Pinky, or point your toward another rescue that can help?
Jack Russell Rescue OWII was inaugurated in 2006 to help Jack Russell terriers in need of new homes.
jackrussellrescueowi.org
There is one stipulation on their website to be aware of. They state that they can't place dogs with "a history of
severe aggression toward other dogs" - but I'm not sure if Pinky's issue actually qualifies as severe, or if it's something common among Jacks?
Here's a blurb from the section of their website titled "Putting Your Dog Into Rescue"
They sound knowledgeable about Jack Russells, and they appear to be devoted to the breed. I hope they can help you, or if not, maybe they can guide you towards an organization that can.
Best of luck to you and to Pinky.