I came across this trigger on eBay. The seller claims to be the manufacturer, and if everything he says about it is true, it would seem like an ok deal. Googling didn't turn up much on these... Has anyone ever heard of or tried one of these?
https://www.ebay.com/itm/Q-L-P-TRIGGER-3-0-lb-PULL-STRAIGHT-DROP-IN-TRIGGER/254246936183
https://www.ebay.com/itm/Q-L-P-TRIGGER-3-0-lb-PULL-STRAIGHT-DROP-IN-TRIGGER/254246936183