Just make a Privateer pirate for yourself. Or if this is gear can be sold to the bazaar, you can "trade" the gear to your friend by selling it and then he could buy it from the bazaar. ( This is how I'm able to "trade" Golden Chickens to my friend who likes to collect them. )
Yes, but my friend is 22 and I don't like to clog up my bank with stuff I'm saving cuz then I forget about it and I have to sell it.
We tried that but we couldn't trade the items we wanted to trade (specifically pet snacks).
Pet snacks could be difficult to trade through the Bazaar, yes.
Your friend could be collecting pet snacks from his/her inactive companions, by using the Pet Wranglin' task. They can also be purchased from the snack vendors in Circus Maximus. Helping your friend get more gold via group plunder chests and Treasure Bath doubloons would be a big help for Training Tomes, too.
As for the Privateer gear, I agree that you should create a Privateer to pass it on to -- that additional bank space may come in handy for other drops as well, like ship equipment and pets.