The name of the consultant is: Staffan Melin firstname.lastname@example.org
He's in Sweden. He volunteered to (and did) use the beta version of Scribus 1.5 to convert an Adobe *.imdb file for us, but ultimately we chose to use the current more stable 1.4.2, and we paid him to convert our layout to 1.4.2. He also delivered a great set of instructions on how to use Scribus, to supplement the online documentation and the Scribus Official Manual (available from Amazon).
My only complaints about Scribus so far: (1) their ink pen logo is so similar to WordPerfect (which I've used since version 3.0 in the early 1980s)! (:}, (2) it has crashed a few times, but there is an autosave, although I haven't yet learned how to set the time of how often the files are saved; it's best to save after each article is done, etc..
Another plus: use of Liberation fonts and other open source fonts, not proprietary ones.
With Scribus, anyone anywhere in the world in any operating system platform (Windows, MAC OS X, Linux, etc.) can download the software and collaborate. We had Adobe In-Design on our CSU main journal computer, but when I logged in using Virtual Private Neworking to that machine, Adobe is so smart it "knew" it wasn't me there physically, and demanded a cloud subscription! That did it! That was the moment when I decided to abandon Adobe In-Design.
Given that the 12,000+ OJS journals seem about equally divided among the world's continents, a good source of desktop publishing software seems pretty cool. True, one reason we are doing it this way is that our journal is n-o-t open source (there will be a small sub). This is because we publish narratives of practice and want an intentional readership. Our PDFs will be image only (unsearchable), with only title and abstract searchable, although within Proquest and EBSCO it will be searchable. Thus, we can't use the text, rtf and other formats available from a typical OJS journal.