Most users in the US going for a budget order from Aliexpress, despite all the pieces coming from China. Shipping estimates are usually accurate from most merchants.
As of August 2017, there is a supplier on Aliexpress that sells the full BOM for the HEVO. If you contact the provided email or skype, someone named Lin will reply in an incredibly timely manner, providing quotes and answering any questions you may have. The full kit, shipped, is around 450$. While not initially included, if you ask, they will add in a Titan extruder clone and an E3D v6 clone for 35$.