We are definitely exploring having a common gallery of components (even if the SDKs are stored in package managers) - both as a public gallery and as a private gallery for inside organizations. Definitely interested in any feedback on needs in that direction.
In the even nearer term though, we do expect to add a Community Packages page to the
pulumi.com site where we can collect and advertise packages from across the ecosystem. If you have packages already you'd want to advertise there - please share links - else we'll advertise for folks to share when we roll this out.