need coil packs for 25hp yamaha, 2stk, 2cyl

I need 2 coil packs and possibly a cdi unit for my yamaha outboard. The cheapest i can find them for so far is $77 for coil packs and $300 for cdi. This is ridiculous. do i have to use yamaha parts? Thank you.

25 hp yamaha
model: 25ELHQ
2 stroke
2 cylinder

Yamaha CDI PN: 6L2-85540-10-00
Yamaha Coil PN: 6L2-85570-10-00