Dear Dr. Samuel,
You can purchase one at the SO monastery in Holland
for 15 Euro's (Monastery @ Morephrem. com). Check
then go to
nr. 4. It says the edition was originally published
in London (1823) and later again by the ND United
Bible Societies 1979, containing 1065 pages.
Mor Yuhanon, Syriac Orthodox Church
Hengelo, The Netherlands
PS: if you don't receive a reply, please contact me
(johnnymesso @ hotmail. com) and I will contact them
for you, if you want.