second-level beta extraction for repeated measures design

Hi there, 

I have entered a 2X2 ANOVA and found a significant interaction effect but I am having trouble extracting the betas to interpret this. 

I have a group of patients and a group of controls and I am comparing drug to placebo in a repeated-measures design. I defined my patients and controls in the setup.conditions, and I have defined my sessions as session 1 is drug and session 2 is placebo. I have defined my patient/control groups within Setup.conditions. 

To interrogate my group X session interaction I have entered the contrast [-1 1; 1 -1] which refers to controls > patients; drug > placebo. To which I have found 4 significant clusters which I have extracted the betas using "import values" and then going to setup > Covariates 2nd-level > select covariate > covariate tools > export data to file. 

My question is; this is a single beta weight for each participant representing drug-placebo. I would like a beta weight for the drug and placebo sessions separately. Which makes it hard to plot the interaction for the preparation of manuscripts and post-hoc testing. 

Is there a way that for the significant clusters identified within the groupXdrug interaction I could extract beta weights for the drug and placebo sessions for each participant so that I can plot the interaction.

Thanks in advance!
Sally.