Miroku made a very good basic SXS with no frills back in the 60's and early 70's that they exported to the US. I don't know whether they got your way, but if you find one it should be at a good price. It will be in 2 3/4" chamber, but they open out to 3" with no problem.

I owned one for many years...bought new about 1967...and rechambered to 3" about 1969. I gave it to a lifelong buddy who still uses it as his only shotgun, and he hunts the hell out of the gun...never a problem!