HOW TO GENERATE IRFS WITH CONFIDENCE INTERVALS

Hello,
I have estimated a DSGE model elsewhere and have recorded the marginal distribution for each parameter. Now, I would like to generate IRFs with confidence intervals in Dynare. Please, is there any way of doing this, without having to estimate the model again in Dynare? I only want the IRFs with the bands.
Thanks in advance for any help.
I have estimated a DSGE model elsewhere and have recorded the marginal distribution for each parameter. Now, I would like to generate IRFs with confidence intervals in Dynare. Please, is there any way of doing this, without having to estimate the model again in Dynare? I only want the IRFs with the bands.
Thanks in advance for any help.