Vintage 11302 and TEKCATS ....problems

Hello,
i want to calibrate my old 11302 (Firmware 2.4) with the latest TEKCATS  software 2.19.
I got a message, that this TEKCATS version does not support this firmware version, only Ver 2.5 or later.

In cannot get any later Firmware for the 11302 and also no older TEKCATS Version...I am stranded ;)

Is there someone with matching files?

regards
Andreas

You may want to check with the fine folks at VintageTEK.org.  They may have the firmware images for the 11302.