Chief's KWS220 wall mount offers the ability to mount dual screens and lock them in the same plane for viewing convenience.
Also check out the new Kontour™ K2W21H products, which provide additional features and performance:
K2W21HS
IFP Mount Bracket. Customized design VESA Compliant Wall Mount Bracket w/ VESA MiniPC Bracket for Optoma 3 & 5 Series IFP: 3862RK, 3752RK,3652RK, 5652RK, 5752RK, 5862RK, 5651RK, 5751RK, 5861RK