Best way to work with UPS API?

Question

In particular, the TradeAbility API for UPS - I'm trying to embed screening of banned parties in my list of web application for processing / citing. However, the TradeAbility API is a bear.

I found some decent package classes for easy tracking that I have successfully implemented. But I did not see anything to support TradeAbility. UPS-PHP has it on its TODO list, but the author switched his focus to a paid application (which also does not support it).

Any findings are appreciated.

Thank.