MaxMini.eu have added the 28mm Iron Pattern Jump Packs to their online store.
From their website:
Set of 5 jump packs. Each jump pack consist of 3 pieces – main jump pack and 2 exhausts. Fit most 28-33mm miniatures. Require assembly. Supplied unpainted.
Sculpted by FreakForge and Hamster52.
Painted by Aleksander Kidawa.