It's time for the next 'tweak' on my PT1911. I've got a CrimsonTrace laser grip installed, the ambi-safety swapped for an extended left side only, and now, as the title states, I'm looking for an arched main spring housing. I would prefer grooved or possibly smooth - not checkered, and would prefer black or stainless since my PT1911 is black - but would settle for blued. I'm hoping that someone has a take-off that they would be willing to part with. Thanks for looking.