You may have big problems finding a good shoulder rig for a 52" chest with most major shoulder holster makers.
You can check around but Lawman Leathergoods offers the treated STU rig in black and the popular Dirty Harry style.
Some members have complained about the firms customer service. They may have a model you can buy for a .44spl revolver.
The Bianchi X15 shoulder holster is well known too.