That hind-end picture with the big clam-shell doors dates from CT, but there were no deckplans of that version until late MT. FASA had a totally different version in an early magazine, but it suffered from, shall we say, a 'lack of vision". Their next attempt was the Chameleon, at twice the tonnage and half the rules-compliance.
DGP did a "back-of-the-envelope" deckplan of the clamshell model in their magazine for MT; the same issue had another picture, IIRC. They also did the starboard silhouette in SOpM.
TNE didn't address the corsair at all, that I recall, and certainly didn't do a deckplan.
T4 re-imagined the Corsair, as they did all the rest. As with most of the "deckplans" that appeared in T4-Starships, the Corsair was shockingly forgettable.
I don't recall G:T covering the Corsair, but they may have. No deckplans that I recall, though.
T20 hasn't gotten that far yet.