I hope somebody can come up with something for you but I have my doubts.
Using arimidex to control E2 in a trt protocol is an off label use. You can see plenty of studies on it's use on women after breast cancer etc but most Doc's who understand trt just know it works. They see serum E2 levels come back into line and hear from their patients about how much better they feel without female levels of estrogen.
Many trt docs only worry about E2 once it surpasses 50. But Docs who really know their stuff will watch it and ask about symptoms well before that.
None of this will convince your Doc. You might need to take control of this into your own capable hands. You won't be alone.
You could always provide him With Dr Crisler's TRT paper.