JATX,
You could try the V9 detent plate, makes the HK45 work just like a 1911. Only $10 from HK USA. Lots of shooters like the LEM DAO, no safety & no decock ($100).
All the different Variants at the bottom of this page.
http://hkpro. com/index.php?option=com_content&view=article&id=57:th e-usp&catid=6:the-pistols&Itemid=5
Lanyard