First post after a year of lurking following my conversion from Finale (which had me in its grip for 30+ years) .
Background: I occasionally set music in shaped notes, usually in the Walker 4-shape system found in The Sacred Harp. These are typically songs from other books that have their own idiosyncratic shapes (e.g., the shapes used by M.L. Swan in the 19th-Century New Harp of Columbia).
When I do this, I try to follow the conventions of the most common version of The Sacred Harp, i.e., the Denson book most recently revised just this year (and before that in 1991). Dorico makes shape notes much easier than Finale ever did, but I’m struggling with the repeat.
Dorico provides the option to use a four-dot repeat, as The Sacred Harp uses, but I can’t figure out how to follow the dots with two thick lines, as used in that book, e.g.:

I can get the four repeat dots followed either by a thin line/thick line combination or by a single thick line (by setting “Gap between thin and thick barlines for final barline” to 0 in Engraving Options), but I can’t figure out how to get the repeat dots followed by two thick bar lines.
Can Dorico do this, preferably without too much of a hack?

