RHEL 6 - How to install font 9x15?

Hi Folks,

We need to run a very very hold electromagnetic simulator named "ASITIC" on our 2 RHEL 6.10 compute servers.
I've been able to install the missing dependencies.

The software (Linux version) can be found here:
http://rfic.eecs.berkeley.edu/~niknejad/asitic.html

I thought it was OK, but when the tool is displaying some "old fashion way" graphics, I got this error message:

Warning: Unable to allocate 9x15 font Segmentation fault (core dumped)

After searching (and testing) a lot, I've not been able to solve my issue.
It seems some old 9x15 fonts are missing.

When launching the command:

xlsfonts | grep [0-9]x[0-9]
All I got is:
6x13

I'm really desperate. Any help will be very very welcome.

BR,
Seb