Mask Blur tool in Action / Selectives?

There are some great tools like K_BlurMask, some sapphire stuff, etc. that do proper mask blurs in batch, using a gmask input (the tool will not bring in shades or textures from outside the matte).

But I haven’t been able to find any tool that works like this in Action, using Selective FX or anything else, with an action gmask as the strength source.