Want this question answered?
It would help if you stated the model. So here is what I can do. Crosman owns Benjamin air guns, they offer a service to locate repair shops that repair older Benjamin products. See the link below.
A place which carries parts for that pistol, presumably. We'd be happy to direct you to such a place, but we can't, since we have no idea what the make and model of your pistol is.
I suggest you try this web page. BTW Crosman owns both Benjamin and Sheridan air gun products. You can also contact Crosman and ask for help.https://support.crosman.com/hc/en-us/sections/200649600-Benjamin-and-Sheridan-Air-Pistols
I have a Model 101-22 Cal. L.R. SN 10467 that I will sell for parts.
The model 122 was part of the Benjamin 110 series of rifles they included the 110, 112 and 117. They were made between 1938 to 41. Today Crosman owns Benjamin. Crosman offers a search service of people who repair older airguns. Click on the Crosman link below and then "click' on "Find a service center" Follow the prompts to find someone who repairs your model.
GUNPARTSCORP.com and JACKFIRSTGUN.com carry lots of parts.
SOME (not all) parts are available from gunpartscorp. Check their website.
Try e-gunparts.com
try coffeys gun shop gadsden Alabama they have a lot of rare parts for handguns and rifles
Even though that gun was made by Wiinchester and is basically the same as the Model 1200, the trigger guard and stock are different and those parts from the Model 1200 will NOT interchange. There is no commercially available pistol grip kit for the Sears Model 200.
Which model. If the model number starts with 126 it was made by Crosman if it starts with 799 it was made by Daisy.
Crosman co owns Benjamin and Sheridan. They supply parts for current and some older model Benjamin air rifles or they offer a service to locate someone who repairs older Benjamin rifles. See the link below. When it opens click on "Find a service center."