Weird, they are part of OE-A and plugin should be listed in the system plugins category
Here is the latest mips version. It still has the libc and enigma2 dependencies in the control file. I have not been able to find out how to to repack ipks yet. If it does not install, maybe try install with no dependendencies
I think the command will be
opkg install --nodeps /tmp/*.ipk
Edit: Also added duo4k Arm version
