Looking into buying some new speakers for my car as the stock ones are pretty awful. Been looking on Pioneers website as they seem like the only people who supply ones that fit, but they mention speaker adapter plates. The CA-SI-FA-1.16 and the CA-SI-FA-1.13 adapters to be precise, does anyone have a clue where I can buy these from?
Any help would be appreciated.
Thanks.

will these plates angle the speakers upwards?

have you found were to buy them?