Not strictly a Junicode matter, but..

[afarlie]

I note someone had extracted individual forms from an old work on court hand:-
https://commons.wikimedia.org/wiki/Category:Court_hand_letters_in_PNG

It may be possible for someone very technically competent to adapt them into a script font. ~~~~

[psb1558]

Whoever drew those had a very elegant hand. The complete book is Andrew Wright, Court Hand Restored, 9th ed. (1879). Full of good stuff.