You might try this link. Copy and paste it. http://www.gun-parts.com/index.html/
This is a stevens model 39A. The stevens 59A, B and C all had the takedown screw in front of the trigger guard.
http://www.forsterproducts.com/Pages/screws_trigger.htm
That gun should be a Mossberg 183K. For parts, try: Numrich gunpartscorp.com Jack First jackfirstgun.com Bob's Gun Shop gun-parts.com
Try e-gunparts.com
Smith and Wesson Model No. 2
Can be found on the left side of the weapon just above trigger housing.
The Model 30 is a take-down gun, with the serial # on the lower tang behind the trigger guard, and alson on the barrel, once removed from the frame. I believe the gun is a Stevens 520 or 620 with Wards name on it.
The trigger guard is available from Numrich Gun Parts. There are two different types of trigger guards for the Savage 6d. The plastic guard that has a inletted area for the trigger guard in the stock and the simple bent metal trigger guard that just screws into the stock wood. Plastic trigger guard is product # 103530U $24.10 Metal guard is product # 10543OAL $11.50
I have a CNC Billet Aluminum tube fed trigger guard for a Winchester model 77. I have then polished or hard black anoidzed.
The western field (montgomery wards) model 72C was made by mossberg arms company.The mossberg model 472 is the same as a western field model 72C.
The western field model 15A was made by mossberg.There model designator was the mossberg model 83.
They were made by Savage for Montgomery Ward, it's a single trigger model of the Savage 311.