Which bottom metal parts for Choate stock

Have a 111 LRH, 6.5-284 in an accustock with the hinged floorplate. Center feed. Trying to install in the Choate tactical with a blind in the stock.
Have read posts all over the internet regarding this, but cannot see what parts are needed to make a blind mag for top loading.
I tried to use the parts from the accustock, but the cartridge won't go high enough to chamber.
Anyone know what parts I need and a vendor name to do this mod? The lady at Choate did not have a clue on this matter, FWIW.
Thanks, Richard