HF,
I used Treatstock for printing. Cost was $7.35 USD plus shipping to have the parts printed. Once you load the drawings on Treatstock you can select materials color etc. and you will be given a list of printers and their cost to print. With smaller parts like these I order two sets and shipping costs the same.
If you could get these printed locally it might be cheaper.
Best of luck with the build.
KN6DMO