Take it to a gunsmith
Try the link below.
The 132 came with plastic or wood grips. Some of the plastic grips had Checkering, however I do not believe the wood grips ever had checkering.
There are many manufacturers that make pistol grips for shotguns, including sear model 200, 12ga. Some popular brands include Hogue, ATI, Blackhawk, and Magpul. However, it's important to note that not all pistol grips will work with all shotguns, and it's essential to ensure that the pistol grip you choose is specifically designed for your shotgun make and model.
Check the frame, barrel, butt and under the grips
they are avaliable from "vintage gun grips, inc." vintagegungrips.com
You might want to try e-gunparts, if you're looking for original factory grips. Another answer: Try vintagegungrips.com for aftermarket grips. They list 103 grips for $31.00
The Kimel firearms company is out of business, so your best bet is online. Either gunbroker.com or try Numrich Arms.
Need to know the Colt model.
Proofhouse.com has a store brand chart. Try e-gunparts.com
How much does a used Winchester model 1300 excellent condition with pistol grips and a side saddle go for?
50 or so