Delay calculator available somewhere?

Hi, from what I had noticed, there used to be available a spreadsheet that could be used to compute frame delays. Does anybody still have it around and can share it? It would be quite useful. Every link I tried seems dead.
Thank you.

Hi, I do not have xls, but remember that in the code it was something like “calc_msg_time()” or so fn, which was calculated length of different parts of frame precisely.