trigger group and parts

I've been tinkering with the idea of building a pcp.  I'm wondering about the availability of a decent modular trigger group that I could buy and design the rest of the gun around.

How about it - any complete trigger groups come to mind?

[DanoInTx]

I'm no engineer, but the way I understand these things the way a trigger works around the rest of the action has as much to do with the gun as the valve and the barrel.  For instance, the trigger on my B50 lets the hammer slip by and pound the valve stem, but it also works to counteract the bounce of the hammer from being sent back by the valve on rebound.  To do it right, by the time you bought someone elses trigger you'd undoubtedly modify the heck out of it for your application at which point you may as well design it yourself.  Just my $0.02

[3n00n]

Like this?

Yup.  Looks like the ticket.