Does anyone know where I can get a synthetic stock for my Remington Model 11? Or is there a stock that could be modified to fit the model 11? Thanks.

You can get a replacement walnut stock set through Cabela's.

Yep Remington Model 11 = Browning A5.
Same gun.

No, it is not the same gun. This is totally wrong.

Remington leased the patent for the Model 11's design from John Browning, so there are some parts of the action that are the same or similar and there are also parts that are totally different.

It is possible that the stock on SOME Model 11s and A5s might be similar, but they are NOT the same. My father owns a Remington M11 in both 20 gauge and 16 gauge, and he also has an A5 in 16. The stocks are not the same, there is no way they would be interchangeable.

Grouse

Good point ... something I learned years after my grandfather passed away and I was given his "Browning Auto 5", or so I thought.
I was attempting to remove the butt stock and removed the wrong spring, somehow affecting c o c k - ing ... I took it to a local smith and begged him to make my grandpa's Browning whole again. He chuckled and asked me where the gun really came from. I said my grandfather was a gunsmith and I should know what I had, cause the barrel clearly said "Made in Belgium”... so I was convinced I had a fine weapon.
The smith told me that someone knowledgeable had pieced together a serviceable Remington 11 from many odd parts. He pointed out the trigger guard was from one model (Remington), the barrel another (Browning) , and he fixed it for me.
It is a nice old gun that shoots fine with certain loads. I heard that I can switch the position of a spacer sleeve that sits in front of the spring (under the forearm) and that allows me to shoot different power levels of loads ... but I'm not familiar with it so just shoot the #6 squirrel loads that work just fine.

I stand corrected. The stock on my Browning A5 circa late 1930s is identical to the stock on a close friends Remington Model 11. So its not totally wrong.