I'm curious as to why it cost so much to get them replaced? I'm assuming that's gunsmithing fees. A new metal trigger and metal guide rod are around $40-$45 at most for the parts and only takes 15 minutes to replace. I've changed out tons of these before.
Trigger was $55. Guiderod was $20 (I think). Throw in shipping and I guess it was less than $90, but not much. I also put in the WOLF INS trigger return spring. That was also about $20. Put them in myself. Took 15 minutes.