Yup, this series has been on translation hell since January 1st 2006 when the first chapter was published by Solaris-SVU and the last chapter done by them was the 28 published on November 11th 2011. For my part I think I read this series either on 2011 or 2012, so I have also got a good amount of time waiting for the release of a new translated chapter.
The only way I see to solve that problem about the RAWs is to either scan the volumes from fourth to eighteenth or to buy the digital version of those volumes and then rip them, for my part I see as a easier task to rip the digital version, besides on that way the shipping fees are avoided. The problem of buying all those volumes would be the total price, for example,
the whole collection with the 18 volumes on Kindle has a price of 9539 yens, that may be a bit step for some people, although not so step if several people take the initiative to finance that ripping project.
Still, thank you for translating this chapter, it is very nice to see a new translated chapter after more than half a decade.