Sorry, I haven’t heard of them.
Have you checked Writer Beware? You can find them at http://www.sfwa.org/other-resources/for-authors/writer-beware/
They’re also on social media. It might give you a place to start.
Also, you definitely want to check the RWA site and consider posting this question in the PRO or PAN forum there, too. Surely someone there has worked with them. 🙂
I’m shopping a World War II historical fiction (non romance) manuscript and have been asked by Scarsdale Publishing to send them the full manuscript. Does anybody have any experience with them? They seem to do a lot of romance books.