If your club is not a member with CMP the manner in which you qualify to purchase a Garand or Springfield is to: (1) Shoot at least 50 rounds in a CMP match at any club that has these matches. Most clubs that have these matches have them open to non-club members. The score does not matter. A form is signed by the rangemaster stating that you shot in a CMP event. (2) Be a member of the Garand Collectors Association. Dues are $25.00 a year, I believe. The CMP site lists all the clubs that are CMP members state by state.
You mail in your signed CMP event form, a copy of your Garand Collectors Association membership, other completed forms found on the CMP site and after a period of time Fed Ex brings the Garand or Springfield to your door.