I have been told CHC have filled the Essendon positions.
Last I heard, CHC were commencing the contract in Essendon in October this year with the Warnambool helicopter due sometime next year.... I imagine the Warnambool gig would have to go to tender (may be wrong) as it wasn't part of the original tender for HEMS aircraft in Vic.
A betting man would go with a CHC B412 for that one as well.