I was going to suggest the RA4 thing too. You'll get colour funkiness unless the filter pack is exactly right, but that can be a powerful creative option should you choose to employ it.

If you want to print on graded paper, there's one more contrast hiccup to deal with: the C41 process is aimed at (I think) a contrast index of about 0.5, whereas people will typically develop B&W films to a CI of 0.7 to print a "normal scene" on grade 2 paper. So even without the orange mask causing you grief with VC papers, the lower inherent contrast of C41 will mean you need to print harder still. If you're buying graded papers for the film you've already shot, I'd start with grades 3 and 4 to mitigate the lower CI.