M1903 / A1 Sniper Rifle Scope Mounts

[Herschel]

The scope mounting blocks for the 1903 sniper are the Lyman "O" and "E". Unertl and other companies made the same block but don't know what their part numbers are.
These blocks used to be available on he internet auctions and were reasonable priced until people building fake sniper rifles started buying them and ran the prices up.
These blocks are being manufactured by someone but don't know who are where they are available from.