I wanted SMB but it may not be practical.
+1 to HSB.
However, if you really want the SMB, even if you feel you have to stock LMB--just put in some larger ones with your LMB. Sure, they won't flourish, but you'll have enough adaptable individuals that survive to make an interesting addition to your fishery.
If you make the right connections, you might be able to find someone in NE with a SMB pond who is willing to give you, or let you catch, some larger SMB culls. I try to remove around 50/year from my pond, in the 8-14 inch range, to keep competition for the larger fish down.