Hi Madabout, the Avenger and Hibernia were very similar in hull SHAPE but differed in size a little,
Dhulia/Moorcock 113'6"" x 28'8'' x 12'6""
Avenger/Hibernia 118'5" x30'1" x12'
so with a little adjustment you should be able to adapt the plans you have to suit,
also in later life 1975 they were both fitted with Towmaster Gear ie Kort and triple rudders.
the wider hull and extra length accounted for the fire tower and extra pump engines in the ER as well as a longer main engine 9cyl instead of 8'
I have posted a picture of the avenger model that I made using a modified moorcock hull.
If I can help you please send a message and i will try to help.
all the best George.