to the forum.
Don't know of any drydock garage kits, but some of the other members might.
If there are any out there I would expect them to be priced very high.
Resin I think might not be the best material for such a project.
Depending on which drydock you are after, they had several variants.
I think with some good scale plans, balsawood and some sheet styrene the drydocks could be made fairly easily.