Grapefruit juice powder / grapefruit supplement?

I’m using grapefuit juice with 1mg weekly to conserve rapamycin tablets. I was curious if anyone knew of a grapefruit supplement or powdered form that I could take with me while I’m traveling. Grapefruit juice isn’t the most common thing to find on the road. Thanks!

How about taking some whole grapefruit?
Another option (assuming you are not taking any other medications) might be ketoconazole

See: Improve Bioavailability of Rapamycin (pt 2)