Check with stores that sell BB guns.
BBGun "benjamin franklin" pump gun CAL. 22 model#132 S.N. B183005 made U.S.A. Gun good condition , need 1 part
You need to do a internet search.
You might find parts at a gun show, but, don't hold your breath
You need to identify the gun better as to the manufacturer. Parts are available at: Numrich gunpartscorp.com Jack First jackfirstgun.com Bob's Gun Shop gun-parts.com
Numrich gun parts has an assortment of parts for the 88. Go to their website.
The only locations I know of are Dixie Gun Works, Track of the Wolf and numrich gun parts. They may have what you need or be able to cross reference parts that will fit.
try: gun-parts.com
You will need to identify the gun better than a "model 170" as in what is the manufacturer, caliber, type of gun, etc. Parts are available here: Numrich gunpartscorp.com Jack First jackfirstgun.com Bob's Gun Shop gun-parts.com
Go to http://www.e-gunparts.com/ They have many gun parts. I have always found gun parts I need at this web site.
Gun Parts Corporation is the main supplier of Numrich gun parts. On eBay, one can find Numrich gun parts. On Amazon, one can find a few Numrich gun parts.
Check with numrich gun parts corp.they can be found on the web.
Not sure what parts you need butwww.midwayusa.com has some parts and e-gunparts.com also has them from time to time. also try gunbroker.com and looking the parts section, you may find parts or a parts gun with what you need.