Ordering compound prism

[jpways]

So I received my first prescription with a compound prism. It was prescribed as "2 PD Base Down & Out @ Axis 135 OS only"

After finding the proper conversion method, I figured out that it was 2.00PD @ 315 = 1.41 BD 1.41 BO and then I try to order it.

So, I looked at Visionweb, Eyefinity, and the lab's website. None of them have a way to order prism with a Power and Axis only horizontal and Vertical. So, I try to order it as 1.41BD 1.41 BO and get kicked out on all 3 sites, the accuracy that the sites want is: Eyefinity to the nearest 0.50D, Visionweb to the nearest 0.25D, and the lab website to the nearest 1.00D.

So, I order it as 1.50BD, 1.50BO (with notes saying what the prescribed prism was), so 2.12D @ 315, I believe this is within ANSI standards, but I still feel like I'm changing the prescription since I have a 0.12D difference.

So, I called the lab and they're changing the order at their end to fill it as prescribed.

My question is, does anyone know of a website that I can order the prism as Power/Axis?

Also, am I just being overly cautious by not ordering it as 1.50BD 1.50 BO?