Owing to the kindness of a number of well-intentioned colleagues (Lubomir Ondracka, Peter Wyzlic, David Smith, Christophe Vielle and an old acquaintance who wishes to remain anonymous) it is my pleasure to pass on the information they have provided me with on the two titles I had been unable to trace while writing my earlier mail:
A PDF of Jagannātha Tīrtha's Dīpikā on Madhva's BSūBhāṣya is available from GRETIL:
http://gretil.sub.uni-goettingen.de/gretil_elib/BBs900__Badarayana_Brahmasutra_COMM_Madhva-Bhasya_Jagannatha-Dipika.pdf
The quoted passage will be found on p. 319 of this edition.