You need strips that are one and one half inches wide and 1/8 inch thick? I have seen
hardwood strips, as well as "bass wood" in the big box homestores.. HD/Lowes/Menards, but not that size. I never could find out what "bass wood" is, kinda like "mystery meat" in your school lunch room. I think it is probably not a "hardwood", though, and have wondered about its strength for big load bearing like
highballing a Triplex across trestles made of it. Those home stores custom cut wood... check their stocks and then ask a sales person.