Oh I wouldn't say that as this site has many, many 6" long Inlace Acrylic 1.5"X1.5" blocks and for a Very Reasonable Fee will cut them into 1/8"+ blanks for you.
I just counted and there are 94 different colors all in 6" long blocks (with most available in 12" lengths).
Plus under the Pen sized Inlace Acrylic is an assortment of basic colored blocks that are 3/4"X3/4" that can be used for wedges. :tu
Inlace Acrylester Spindles - Woodturningz