Compilation of our results along each PDR cut defined in Figs. 4 and 9. Upper panels: the local density and UV radiation field profiles as a function of the distance from the star along the r or A_V axis of Fig. A.1. Central panels: blue, yellow, and red represent the contribution of PAH⁺, PAH⁰ and eVSGs, respectively, as extracted from the fit. Solid black lines represent the corrected mid-IR emission profile. The dotted lines represent the fit obtained with the geometrical model described in Appendix A. Lower panels: the variation in the fraction of carbon atoms locked in eVSGs relative to the total carbon in all the AIB carriers. The grey-shaded regions are those that were not considered in Fig. 6 and Eq. (5).