after playing with the ET brand "unilug" washers a bunch way back in the 70's, i don't recommend them.
even if you glue the washers in place, they flop around, and when you finally get them installed, you MUST keep an eye on them so they STAY tight !
i didn't like them then, and i don't like them now !
in fact, i'm not even a fan of the "slotted" hole style that doesn't require the special washers.
get the right, direct fit, bolt pattern wheels the first time.
i believe you will be glad you did.
just my grumpy old man opinion, your mileage will vary.