Trying to locate recordings with Salt Lake Center between LWT and HLN, V113

[marineman]

Trying to locate the recordings with ZLC (Salt Lake Center) from August 18 at approximately 2100 - 2145 Z.
I had a loss of engine power and made a forced landing approximately 75 NE of Helena, MT along V113 between LWT and HLN.  N4128T.  I think the center freq. was 133.40. IFR Flight Plan at 11,000. Thanks