There are not many specifically verbal prep courses. The only one that comes to mind is GMAT Pill
On a side note, all test prep companies have prep online (live) or on-demand courses these days. It is hard to say which one of them has the best Verbal course as different things work for diff people. I know
MGMAT has a strong SC product and PowerScore is know for CR. Veritas has some great new questions, Knewton has an adaptive learning product, Revolution Prep has an innovative product, and Kaplan has a very strong methodology/teaching resources.
It is really about picking one and putting all your effort behind them. Since you have used the
MGMAT books, you may want to try another course instead. Here are some reviews:
gmat-prep-course-class-reviews-ratings-discount-codes-78451.html?fl=menuI would probably recommend and on-demand course since you want to jump to verbal and not have to wait for the class to get there.
Hope this helps.