RE: Pz IV 7.5cm KwK 37L24 question
Might ping these guys....
[link]http://www.welshdragonmodels.co.uk/tank-modellbau-75cm-kwk-l24-short-barrel-recoiling-for-heng-long-panzer-iii-116-scale-807-p.asp[/link]
looks like thay have one (out of stock) for the P IV as well
[link]http://www.welshdragonmodels.co.uk/tank-modellbau-75-cm-barrel-recoiling-asiatam-system-kwk-37l24-ausf-de-for-heng-long-panzer-iv-826-p.asp[/link]