Any good gunsmith can find or make parts for your shotgun. It might take several weeks to a year or more. Parker Brothers are a top of the line shotgun, and a shotgun in working shape is worth more than a broken one. Do some checking around at a local gun show, or surf the web for parts.
Where can you find parts for your Charles daily shotgun
Modle 101 1380 410 shotgun
Check under the forearm
The serial of you Parker shotgun did not print in your question. But to find a date by serial number, there is a Parker Gun collector website that has a list of serial #'s and date of manufacture. The website is : http://www.parkerguns.org/
Parker double barrel serial #131072 what would the grade be and date made.I can say that with the serial number provided,your Parker shotgun was made in the year 1904.As to the grade,that would be impossible to say without a detailed description of the shotgun in question.you may find that there is much info available to you thru the internet about parker shotguns that will assist you in deciding which grade of Parker shotgun you have.
www.gunstockinc.com
Numrich Gunparts.
it is a Stevens, parts are interchangeable...
www.e-gunparts.com They have all the parts you need
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Have you tried e-gunparts.com?