Use of thirdparty libraries and maintaince?

[Chewbakka-Wakka]

I see 2 or arguably 3 thirdparty libraries which can only be built here to support the end package so you must run configure using:
--with-lidort-3.8=build
--with-2stream=build

Build own LIDORT 3.8 library: yes
Build own 2stream library: yes

2stream library ( aka libtwostream )
lidort-3.8 library
radiant library

Now in each of the other library cases i.e. gsl can be found elsewhere and installed separately meaning no need to build.
When looking these up, the only references I find are for lidort:

http://www.rtslidort.com/mainprod_lidort.html
https://web.gps.caltech.edu/~vijay/Papers/RT%20Models/lidort_3p6_userguide_v7_28sep2012.pdf?fbclid=IwAR0PTturfB0JJLSe-QP126q7OA2mI1Uzwdsq5Zit9Rad312rs0Jlm7dLAos

Q is, where are these maintained outside of this repo elsewhere as independent libraries like that of gsl? If anyone knows, so I can work to provide an RPM along with those other libraries.

[Chewbakka-Wakka]

Hope to get help on these issues, I attempted to reach out to the LIDORT 3.8 library maintainers to no avail...