It might be worth your while to check your collection of you collect Washington chips. Several recent issues from different locations have been very similar. I collect only the $2.50 chips but I suspect the other denominations are also much the same.

If you go by memory and tend to say "I already have that one...", you might look again for Silver Dollar and Grand Central. There are differences, like the color of the circle around the chip and the style of the denomination, but there's more similarity than difference. See the scans below for examples.

By the way, there's also a pink Silver Dollar $2.50 from SEATAC that has the same design as the yellow chips.