Search:

May I ask, did you buy only the stock or also the handguard(s)?

Lee Enfield Stocks

Seems this company can offer what you are looking for.

I was not under the impression the Model of 1917 is a Lee Enfield rifle ;).

Seriously though: them not listing this on their website doesn't mean they don't make it. Seems they have a production...

I think these originate from Minelli SpA. This company is known for selling 1903(A3) stocks to various retailers, so why not also 1917 stocks, especially if they mention they come from Italy..
...