I’m sorry I don’t have a lead on a cheaper source, but FPP is another option for those who struggle with traditional piecing methods/accuracy. I have seen some people use FPP even for large pieces/simpler blocks. Kristen at ScrapFabricLove on YouTube does this sometimes.
eg 1:
https://youtu.be/yaZA_RAh30E?si=WtodamXE7puhGqSy
eg 2:
https://youtu.be/XBp__lqCohQ?si=maEwAT4i62xDigie
you can also buy little pads/books of specific FPP blocks (brand Sew Emma)