Rifle Scopes Objective cover options

[Bosshaus]

Hi guys, I'm in the process of ordering a Millett Buck Gold 6-25x56. Midway cust serv says they have no Butler Creeks to fit the obj but I looked at BC's fit charts found on the magic interweb, and found one I think might work. The scope is listed as having a 67mm dia obj tube. BC makes a 67.1 (53A) and a 66 (53). Is the 67.1 incher going to have to be shimmed with tape? Are there any other options besides BC's? Thanks for the helps