you might contact woodlanders

strangely I've noticed that Ichang papeda doesn't seem to do as well here in the PNW (8a) as Yuzu does, even though all the literature and experience on the East coast says Ichang papeda can handle more cold.

Despite what many people say, the fruits are edible, if not the best eating quality. Tastes a little like Yuzu but more lemon-like than the more orange-like flavor of Yuzu. The taste reminds me a little of gin (or juniper berry). Even the peel is kind of borderline half edible (more so than the peel of a lemon) although just a little skunky if you eat too much.

If think Ichang papeda fruits are almost entirely seedless unless the flowers were pollinated by a different variety. It's sour and not much edible flesh inside though, but the white rind and peel is less bitter than other citrus fruits though. I mean maybe almost like eating a kumquat hybrid.