Thanks Haidut, have checked-out that website now. However if aiming for the target of 2000IU as per the Schute Bros the monthly cost is quite extreme.
I don't think such a high dose is needed. The studies on aromatase inhibition or estrogen receptor antagonism show doses around 700 IU - 800 IU are enough. Unless the Schute brothers found that higher doses are needed for some type of special effect that lower doses cannot provide.