Sorry to say, but probably very few all over the world knows about this species more than the famous monograph of Peter Taylor.
According to the monograph, U. schlutesii grows in low(<450m) wet savanna from southeast Colombia to Southern Venezuela(i. e. the northern end of the Amazon Basin), flowering in September and October.
I hope you propagate this species all right for distribution among other CP fans some day ;)
Having seen the plant I can vouch that it definitely doesn't look like any other U. tricolor that I've seen. The leaves are quite different and form what appears to be a rosette. The flowers are also very small- I was quite surprised after seeing these images as I expected them to be much larger. The inflorescence was only about 7-8cm tall.