I would like some U. humboldtii, and if you happen to have some U. nelumbifolia, I'll add N. thorellii x witteii.

Will trade rooted cuttings of N. ventricosa red and N. ventrata, as well as a cutting of N. alata green and a cutting of N. spectabilis.

Here are more Utrics of interest, but the above are the important ones.
U. volubilis
U. firmula
U. pusilla
U. simulans

~Edit: one of the Neps got claimed. It's not on the list. ~