My only option: don't buy it.
Almost pretty sure it's gonna be held because it's a replica. Check for some canadian retailer, by memory i saw once an gas powered winchester.
If you get Age verified, some people here can give you better information where to find them, or maybe they have one to sell. (I don't know i'm not AV myself)
-KWC P226 X5
-Ra-Tech WE HK416