The Tzitz Eliezer deals with a similar question – A Rabbi falls holding a Sefer Torah. both are on the floor, who do you help up first? He explains that its dependent on how you answer a stira in gemaras . One place it says that a Torah has more of a din kavod and in another gemara its mashma that a Rebbe has a greater chiyuv. In the end he shows its really a three way machlokes.
A) The Rebbe has more kavod since he fulfills the purpose of the Torah, therefore should be taken care of first.
B) The Torah as the source has a greater level of kavod and it comes first.
C) The gemaras were referring to different types of Talmidei Chachamim -a “stam” T”CH and a Gadol B’yisroel. The Gadol has precedence over the Torah, and the Torah over the Stam Talmid Chacham.
One could argue that the same would be in your case.
It should be noted that if there is Tzar to the Rebbe then all agree he has kadima over the Sefer Torah.