You can find another, more broadly used film, like one of the two you usually shoot, and make a relative comparison of development times with the two developers you mention, from another chart, or source. Then apply the same difference factor to your time with either of the two films you reference. It may be not be perfect, but you'll probably be able to print them, because the reference time is based on yours, not someone elses.
There is always the choice - find the final exposure and development recipe for a new film/developer combo over several rolls of normal shooting and tweaking, or just sacrifice one roll, bracket exposures over the whole roll (three sections, each with bracketed exposures), same subject and light, then process the three sections of film at three different times to establish a matrix of combinations, one of which should be very close.