I have them in Logos. Would that be any use to you? Or are you holding out for the printed edition? I could make you a PDF if that would be helpful. Obviously Manton is in the public domain.
EDIT: I made a PDF and uploaded it.
THE COMPLETE WORKS
OF
THOMAS MANTON, D.D.
VOLUME III.
CONTAINING EIGHTEEN SERMONS ON THE DESCRIPTION, RISE, GROWTH, AND FALL OF ANTICHRIST;
AND
A PRACTICAL EXPOSITION UPON THE FIFTY-THIRD CHAPTER OF ISAIAH.
LONDON:
JAMES NISBET & CO., 21 BERNERS STREET.
1871.
CONTENTS
EIGHTEEN SERMONS ON THE SECOND CHAPTER OF THE SECOND EPISTLE TO THE THESSALONIANS
To the Reader
Sermon I. 2 Thes. 2:1, 2
Sermon II. 2 Thes. 2:2
Sermon III. 2 Thes. 2:3
Sermon IV. 2 Thes. 2:4
Sermon V. 2 Thes. 2:5–7
Sermon VI. 2 Thes. 2:8
Sermon VII. 2 Thes. 2:9, 10
Sermon VIII. 2 Thes. 2:10
Sermon IX. 2 Thes. 2:11, 12
Sermon X. 2 Thes. 2:12
Sermon XI. 2 Thes. 2:13
Sermon XII. 2 Thes. 2:14
Sermon XIII. 2 Thes. 2:15
Sermon XIV. 2 Thes. 2:16, 17
Sermon XV. 2 Thes. 2:16
Sermon XVI. 2 Thes. 2:16
Sermon XVII. 2 Thes. 2:17
Sermon XVIII. 2 Thes. 2:17
Manton, T. (1871). The Complete Works of Thomas Manton (Vol. 3, pp. v–vii). London: James Nisbet & Co.